* [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
@ 2019-07-12 0:17 Nick Desaulniers
2019-07-12 0:18 ` Nick Desaulniers
` (3 more replies)
0 siblings, 4 replies; 15+ messages in thread
From: Nick Desaulniers @ 2019-07-12 0:17 UTC (permalink / raw)
To: kvalo
Cc: Nick Desaulniers, Arnd Bergmann, Nathan Chancellor,
Johannes Berg, Emmanuel Grumbach, Luca Coelho,
Intel Linux Wireless, David S. Miller, Shahar S Matityahu,
Sara Sharon, linux-wireless, netdev, linux-kernel,
clang-built-linux
Commit r353569 in prerelease Clang-9 is producing a linkage failure:
ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
in function `_iwl_fw_dbg_apply_point':
dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'
when the following configs are enabled:
- CONFIG_IWLWIFI
- CONFIG_IWLMVM
- CONFIG_KASAN
Work around the issue for now by marking the debug strings as `static`,
which they probably should be any ways.
Link: https://bugs.llvm.org/show_bug.cgi?id=42580
Link: https://github.com/ClangBuiltLinux/linux/issues/580
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
---
drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index e411ac98290d..f8c90ea4e9b4 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -2438,7 +2438,7 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
{
u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
- const char err_str[] =
+ static const char err_str[] =
"WRT: ext=%d. Invalid %s name length %d, expected %d\n";
if (img_name_len != IWL_FW_INI_MAX_IMG_NAME_LEN) {
@@ -2775,7 +2775,7 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
struct iwl_ucode_tlv *tlv = iter;
void *ini_tlv = (void *)tlv->data;
u32 type = le32_to_cpu(tlv->type);
- const char invalid_ap_str[] =
+ static const char invalid_ap_str[] =
"WRT: ext=%d. Invalid apply point %d for %s\n";
switch (type) {
--
2.22.0.410.gd8fdbe21b5-goog
^ permalink raw reply related [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-07-12 0:17 [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static Nick Desaulniers
@ 2019-07-12 0:18 ` Nick Desaulniers
2019-07-12 0:28 ` Nathan Chancellor
` (2 subsequent siblings)
3 siblings, 0 replies; 15+ messages in thread
From: Nick Desaulniers @ 2019-07-12 0:18 UTC (permalink / raw)
To: Kalle Valo
Cc: Arnd Bergmann, Nathan Chancellor, Johannes Berg,
Emmanuel Grumbach, Luca Coelho, Intel Linux Wireless,
David S. Miller, Shahar S Matityahu, Sara Sharon, linux-wireless,
netdev, LKML, clang-built-linux
On Thu, Jul 11, 2019 at 5:17 PM Nick Desaulniers
<ndesaulniers@google.com> wrote:
>
> Commit r353569 in prerelease Clang-9 is producing a linkage failure:
>
> ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
> in function `_iwl_fw_dbg_apply_point':
> dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'
>
> when the following configs are enabled:
> - CONFIG_IWLWIFI
> - CONFIG_IWLMVM
> - CONFIG_KASAN
>
> Work around the issue for now by marking the debug strings as `static`,
> which they probably should be any ways.
>
> Link: https://bugs.llvm.org/show_bug.cgi?id=42580
> Link: https://github.com/ClangBuiltLinux/linux/issues/580
> Reported-by: Arnd Bergmann <arnd@arndb.de>
> Reported-by: Nathan Chancellor <natechancellor@gmail.com>
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Sorry, I forgot a very important:
Suggested-by: Eli Friedman <efriedma@quicinc.com>
> ---
> drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> index e411ac98290d..f8c90ea4e9b4 100644
> --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> @@ -2438,7 +2438,7 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
> {
> u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
> u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
> - const char err_str[] =
> + static const char err_str[] =
> "WRT: ext=%d. Invalid %s name length %d, expected %d\n";
>
> if (img_name_len != IWL_FW_INI_MAX_IMG_NAME_LEN) {
> @@ -2775,7 +2775,7 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
> struct iwl_ucode_tlv *tlv = iter;
> void *ini_tlv = (void *)tlv->data;
> u32 type = le32_to_cpu(tlv->type);
> - const char invalid_ap_str[] =
> + static const char invalid_ap_str[] =
> "WRT: ext=%d. Invalid apply point %d for %s\n";
>
> switch (type) {
> --
> 2.22.0.410.gd8fdbe21b5-goog
>
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-07-12 0:17 [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static Nick Desaulniers
2019-07-12 0:18 ` Nick Desaulniers
@ 2019-07-12 0:28 ` Nathan Chancellor
2019-07-12 2:01 ` Joe Perches
2019-08-01 1:21 ` Michael Ellerman
3 siblings, 0 replies; 15+ messages in thread
From: Nathan Chancellor @ 2019-07-12 0:28 UTC (permalink / raw)
To: Nick Desaulniers
Cc: kvalo, Arnd Bergmann, Johannes Berg, Emmanuel Grumbach,
Luca Coelho, Intel Linux Wireless, David S. Miller,
Shahar S Matityahu, Sara Sharon, linux-wireless, netdev,
linux-kernel, clang-built-linux
On Thu, Jul 11, 2019 at 05:17:06PM -0700, Nick Desaulniers wrote:
> Commit r353569 in prerelease Clang-9 is producing a linkage failure:
>
> ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
> in function `_iwl_fw_dbg_apply_point':
> dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'
>
> when the following configs are enabled:
> - CONFIG_IWLWIFI
> - CONFIG_IWLMVM
> - CONFIG_KASAN
>
> Work around the issue for now by marking the debug strings as `static`,
> which they probably should be any ways.
>
> Link: https://bugs.llvm.org/show_bug.cgi?id=42580
> Link: https://github.com/ClangBuiltLinux/linux/issues/580
> Reported-by: Arnd Bergmann <arnd@arndb.de>
> Reported-by: Nathan Chancellor <natechancellor@gmail.com>
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Applied on next-20190711 and I can confirm that this fixes the issue we
observed. Thanks to you for wrapping up the patch and sending it and to
Eli for giving the suggestion.
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-07-12 0:17 [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static Nick Desaulniers
2019-07-12 0:18 ` Nick Desaulniers
2019-07-12 0:28 ` Nathan Chancellor
@ 2019-07-12 2:01 ` Joe Perches
2019-07-16 17:28 ` Nick Desaulniers
2019-08-01 1:21 ` Michael Ellerman
3 siblings, 1 reply; 15+ messages in thread
From: Joe Perches @ 2019-07-12 2:01 UTC (permalink / raw)
To: Nick Desaulniers, kvalo
Cc: Arnd Bergmann, Nathan Chancellor, Johannes Berg,
Emmanuel Grumbach, Luca Coelho, Intel Linux Wireless,
David S. Miller, Shahar S Matityahu, Sara Sharon, linux-wireless,
netdev, linux-kernel, clang-built-linux
On Thu, 2019-07-11 at 17:17 -0700, Nick Desaulniers wrote:
> Commit r353569 in prerelease Clang-9 is producing a linkage failure:
>
> ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
> in function `_iwl_fw_dbg_apply_point':
> dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'
>
> when the following configs are enabled:
> - CONFIG_IWLWIFI
> - CONFIG_IWLMVM
> - CONFIG_KASAN
>
> Work around the issue for now by marking the debug strings as `static`,
> which they probably should be any ways.
>
> Link: https://bugs.llvm.org/show_bug.cgi?id=42580
> Link: https://github.com/ClangBuiltLinux/linux/issues/580
> Reported-by: Arnd Bergmann <arnd@arndb.de>
> Reported-by: Nathan Chancellor <natechancellor@gmail.com>
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
> ---
> drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> index e411ac98290d..f8c90ea4e9b4 100644
> --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> @@ -2438,7 +2438,7 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
> {
> u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
> u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
> - const char err_str[] =
> + static const char err_str[] =
> "WRT: ext=%d. Invalid %s name length %d, expected %d\n";
Better still would be to use the format string directly
in both locations instead of trying to deduplicate it
via storing it into a separate pointer.
Let the compiler/linker consolidate the format.
It's smaller object code, allows format/argument verification,
and is simpler for humans to understand.
---
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index e411ac98290d..25e6712932b8 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -2438,17 +2438,17 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
{
u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
- const char err_str[] =
- "WRT: ext=%d. Invalid %s name length %d, expected %d\n";
if (img_name_len != IWL_FW_INI_MAX_IMG_NAME_LEN) {
- IWL_WARN(fwrt, err_str, ext, "image", img_name_len,
+ IWL_WARN(fwrt, "WRT: ext=%d. Invalid %s name length %d, expected %d\n",
+ ext, "image", img_name_len,
IWL_FW_INI_MAX_IMG_NAME_LEN);
return;
}
if (dbg_cfg_name_len != IWL_FW_INI_MAX_DBG_CFG_NAME_LEN) {
- IWL_WARN(fwrt, err_str, ext, "debug cfg", dbg_cfg_name_len,
+ IWL_WARN(fwrt, "WRT: ext=%d. Invalid %s name length %d, expected %d\n",
+ ext, "debug cfg", dbg_cfg_name_len,
IWL_FW_INI_MAX_DBG_CFG_NAME_LEN);
return;
}
@@ -2775,8 +2775,6 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
struct iwl_ucode_tlv *tlv = iter;
void *ini_tlv = (void *)tlv->data;
u32 type = le32_to_cpu(tlv->type);
- const char invalid_ap_str[] =
- "WRT: ext=%d. Invalid apply point %d for %s\n";
switch (type) {
case IWL_UCODE_TLV_TYPE_DEBUG_INFO:
@@ -2786,8 +2784,8 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
struct iwl_fw_ini_allocation_data *buf_alloc = ini_tlv;
if (pnt != IWL_FW_INI_APPLY_EARLY) {
- IWL_ERR(fwrt, invalid_ap_str, ext, pnt,
- "buffer allocation");
+ IWL_ERR(fwrt, "WRT: ext=%d. Invalid apply point %d for %s\n",
+ ext, pnt, "buffer allocation");
goto next;
}
@@ -2797,8 +2795,8 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
}
case IWL_UCODE_TLV_TYPE_HCMD:
if (pnt < IWL_FW_INI_APPLY_AFTER_ALIVE) {
- IWL_ERR(fwrt, invalid_ap_str, ext, pnt,
- "host command");
+ IWL_ERR(fwrt, "WRT: ext=%d. Invalid apply point %d for %s\n",
+ ext, pnt, "host command");
goto next;
}
iwl_fw_dbg_send_hcmd(fwrt, tlv, ext);
^ permalink raw reply related [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-07-12 2:01 ` Joe Perches
@ 2019-07-16 17:28 ` Nick Desaulniers
2019-07-16 21:14 ` Luca Coelho
0 siblings, 1 reply; 15+ messages in thread
From: Nick Desaulniers @ 2019-07-16 17:28 UTC (permalink / raw)
To: Joe Perches, Kalle Valo
Cc: Arnd Bergmann, Nathan Chancellor, Johannes Berg,
Emmanuel Grumbach, Luca Coelho, Intel Linux Wireless,
David S. Miller, Shahar S Matityahu, Sara Sharon, linux-wireless,
netdev, LKML, clang-built-linux
On Thu, Jul 11, 2019 at 7:15 PM Joe Perches <joe@perches.com> wrote:
>
> On Thu, 2019-07-11 at 17:17 -0700, Nick Desaulniers wrote:
> > Commit r353569 in prerelease Clang-9 is producing a linkage failure:
> >
> > ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
> > in function `_iwl_fw_dbg_apply_point':
> > dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'
> >
> > when the following configs are enabled:
> > - CONFIG_IWLWIFI
> > - CONFIG_IWLMVM
> > - CONFIG_KASAN
> >
> > Work around the issue for now by marking the debug strings as `static`,
> > which they probably should be any ways.
> >
> > Link: https://bugs.llvm.org/show_bug.cgi?id=42580
> > Link: https://github.com/ClangBuiltLinux/linux/issues/580
> > Reported-by: Arnd Bergmann <arnd@arndb.de>
> > Reported-by: Nathan Chancellor <natechancellor@gmail.com>
> > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
> > ---
> > drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > index e411ac98290d..f8c90ea4e9b4 100644
> > --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > @@ -2438,7 +2438,7 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
> > {
> > u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
> > u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
> > - const char err_str[] =
> > + static const char err_str[] =
> > "WRT: ext=%d. Invalid %s name length %d, expected %d\n";
>
> Better still would be to use the format string directly
> in both locations instead of trying to deduplicate it
> via storing it into a separate pointer.
>
> Let the compiler/linker consolidate the format.
> It's smaller object code, allows format/argument verification,
> and is simpler for humans to understand.
Whichever Kalle prefers, I just want my CI green again.
>
> ---
> diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> index e411ac98290d..25e6712932b8 100644
> --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> @@ -2438,17 +2438,17 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
> {
> u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
> u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
> - const char err_str[] =
> - "WRT: ext=%d. Invalid %s name length %d, expected %d\n";
>
> if (img_name_len != IWL_FW_INI_MAX_IMG_NAME_LEN) {
> - IWL_WARN(fwrt, err_str, ext, "image", img_name_len,
> + IWL_WARN(fwrt, "WRT: ext=%d. Invalid %s name length %d, expected %d\n",
> + ext, "image", img_name_len,
> IWL_FW_INI_MAX_IMG_NAME_LEN);
> return;
> }
>
> if (dbg_cfg_name_len != IWL_FW_INI_MAX_DBG_CFG_NAME_LEN) {
> - IWL_WARN(fwrt, err_str, ext, "debug cfg", dbg_cfg_name_len,
> + IWL_WARN(fwrt, "WRT: ext=%d. Invalid %s name length %d, expected %d\n",
> + ext, "debug cfg", dbg_cfg_name_len,
> IWL_FW_INI_MAX_DBG_CFG_NAME_LEN);
> return;
> }
> @@ -2775,8 +2775,6 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
> struct iwl_ucode_tlv *tlv = iter;
> void *ini_tlv = (void *)tlv->data;
> u32 type = le32_to_cpu(tlv->type);
> - const char invalid_ap_str[] =
> - "WRT: ext=%d. Invalid apply point %d for %s\n";
>
> switch (type) {
> case IWL_UCODE_TLV_TYPE_DEBUG_INFO:
> @@ -2786,8 +2784,8 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
> struct iwl_fw_ini_allocation_data *buf_alloc = ini_tlv;
>
> if (pnt != IWL_FW_INI_APPLY_EARLY) {
> - IWL_ERR(fwrt, invalid_ap_str, ext, pnt,
> - "buffer allocation");
> + IWL_ERR(fwrt, "WRT: ext=%d. Invalid apply point %d for %s\n",
> + ext, pnt, "buffer allocation");
> goto next;
> }
>
> @@ -2797,8 +2795,8 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
> }
> case IWL_UCODE_TLV_TYPE_HCMD:
> if (pnt < IWL_FW_INI_APPLY_AFTER_ALIVE) {
> - IWL_ERR(fwrt, invalid_ap_str, ext, pnt,
> - "host command");
> + IWL_ERR(fwrt, "WRT: ext=%d. Invalid apply point %d for %s\n",
> + ext, pnt, "host command");
> goto next;
> }
> iwl_fw_dbg_send_hcmd(fwrt, tlv, ext);
>
>
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-07-16 17:28 ` Nick Desaulniers
@ 2019-07-16 21:14 ` Luca Coelho
2019-07-16 21:18 ` Nick Desaulniers
2019-07-24 15:38 ` Sedat Dilek
0 siblings, 2 replies; 15+ messages in thread
From: Luca Coelho @ 2019-07-16 21:14 UTC (permalink / raw)
To: Nick Desaulniers, Joe Perches, Kalle Valo
Cc: Arnd Bergmann, Nathan Chancellor, Johannes Berg,
Emmanuel Grumbach, Intel Linux Wireless, David S. Miller,
Shahar S Matityahu, Sara Sharon, linux-wireless, netdev, LKML,
clang-built-linux
On Tue, 2019-07-16 at 10:28 -0700, Nick Desaulniers wrote:
> On Thu, Jul 11, 2019 at 7:15 PM Joe Perches <joe@perches.com> wrote:
> > On Thu, 2019-07-11 at 17:17 -0700, Nick Desaulniers wrote:
> > > Commit r353569 in prerelease Clang-9 is producing a linkage failure:
> > >
> > > ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
> > > in function `_iwl_fw_dbg_apply_point':
> > > dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'
> > >
> > > when the following configs are enabled:
> > > - CONFIG_IWLWIFI
> > > - CONFIG_IWLMVM
> > > - CONFIG_KASAN
> > >
> > > Work around the issue for now by marking the debug strings as `static`,
> > > which they probably should be any ways.
> > >
> > > Link: https://bugs.llvm.org/show_bug.cgi?id=42580
> > > Link: https://github.com/ClangBuiltLinux/linux/issues/580
> > > Reported-by: Arnd Bergmann <arnd@arndb.de>
> > > Reported-by: Nathan Chancellor <natechancellor@gmail.com>
> > > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
> > > ---
> > > drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 4 ++--
> > > 1 file changed, 2 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > > index e411ac98290d..f8c90ea4e9b4 100644
> > > --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > > +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > > @@ -2438,7 +2438,7 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
> > > {
> > > u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
> > > u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
> > > - const char err_str[] =
> > > + static const char err_str[] =
> > > "WRT: ext=%d. Invalid %s name length %d, expected %d\n";
> >
> > Better still would be to use the format string directly
> > in both locations instead of trying to deduplicate it
> > via storing it into a separate pointer.
> >
> > Let the compiler/linker consolidate the format.
> > It's smaller object code, allows format/argument verification,
> > and is simpler for humans to understand.
>
> Whichever Kalle prefers, I just want my CI green again.
We already changed this in a later internal patch, which will reach the
mainline (-next) soon. So let's skip this for now.
--
Cheers,
Luca.
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-07-16 21:14 ` Luca Coelho
@ 2019-07-16 21:18 ` Nick Desaulniers
2019-07-24 15:38 ` Sedat Dilek
1 sibling, 0 replies; 15+ messages in thread
From: Nick Desaulniers @ 2019-07-16 21:18 UTC (permalink / raw)
To: Luca Coelho
Cc: Joe Perches, Kalle Valo, Arnd Bergmann, Nathan Chancellor,
Johannes Berg, Emmanuel Grumbach, Intel Linux Wireless,
David S. Miller, Shahar S Matityahu, Sara Sharon, linux-wireless,
netdev, LKML, clang-built-linux
On Tue, Jul 16, 2019 at 2:15 PM Luca Coelho <luca@coelho.fi> wrote:
>
> On Tue, 2019-07-16 at 10:28 -0700, Nick Desaulniers wrote:
> > On Thu, Jul 11, 2019 at 7:15 PM Joe Perches <joe@perches.com> wrote:
> > > Better still would be to use the format string directly
> > > in both locations instead of trying to deduplicate it
> > > via storing it into a separate pointer.
> > >
> > > Let the compiler/linker consolidate the format.
> > > It's smaller object code, allows format/argument verification,
> > > and is simpler for humans to understand.
> >
> > Whichever Kalle prefers, I just want my CI green again.
>
> We already changed this in a later internal patch, which will reach the
> mainline (-next) soon. So let's skip this for now.
Ok, but this has now regressed into mainline and is blocking Linaro's
ToolChain Working Group's CI, so if you could send a bugfix ASAP we'd
appreciate it.
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-07-16 21:14 ` Luca Coelho
2019-07-16 21:18 ` Nick Desaulniers
@ 2019-07-24 15:38 ` Sedat Dilek
1 sibling, 0 replies; 15+ messages in thread
From: Sedat Dilek @ 2019-07-24 15:38 UTC (permalink / raw)
To: Luca Coelho
Cc: Nick Desaulniers, Joe Perches, Kalle Valo, Arnd Bergmann,
Nathan Chancellor, Johannes Berg, Emmanuel Grumbach,
Intel Linux Wireless, David S. Miller, Shahar S Matityahu,
Sara Sharon, linux-wireless, netdev, LKML, clang-built-linux
On Tue, Jul 16, 2019 at 11:15 PM Luca Coelho <luca@coelho.fi> wrote:
>
> On Tue, 2019-07-16 at 10:28 -0700, Nick Desaulniers wrote:
> > On Thu, Jul 11, 2019 at 7:15 PM Joe Perches <joe@perches.com> wrote:
> > > On Thu, 2019-07-11 at 17:17 -0700, Nick Desaulniers wrote:
> > > > Commit r353569 in prerelease Clang-9 is producing a linkage failure:
> > > >
> > > > ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
> > > > in function `_iwl_fw_dbg_apply_point':
> > > > dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'
> > > >
> > > > when the following configs are enabled:
> > > > - CONFIG_IWLWIFI
> > > > - CONFIG_IWLMVM
> > > > - CONFIG_KASAN
> > > >
> > > > Work around the issue for now by marking the debug strings as `static`,
> > > > which they probably should be any ways.
> > > >
> > > > Link: https://bugs.llvm.org/show_bug.cgi?id=42580
> > > > Link: https://github.com/ClangBuiltLinux/linux/issues/580
> > > > Reported-by: Arnd Bergmann <arnd@arndb.de>
> > > > Reported-by: Nathan Chancellor <natechancellor@gmail.com>
> > > > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
> > > > ---
> > > > drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 4 ++--
> > > > 1 file changed, 2 insertions(+), 2 deletions(-)
> > > >
> > > > diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > > > index e411ac98290d..f8c90ea4e9b4 100644
> > > > --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > > > +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
> > > > @@ -2438,7 +2438,7 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
> > > > {
> > > > u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
> > > > u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
> > > > - const char err_str[] =
> > > > + static const char err_str[] =
> > > > "WRT: ext=%d. Invalid %s name length %d, expected %d\n";
> > >
> > > Better still would be to use the format string directly
> > > in both locations instead of trying to deduplicate it
> > > via storing it into a separate pointer.
> > >
> > > Let the compiler/linker consolidate the format.
> > > It's smaller object code, allows format/argument verification,
> > > and is simpler for humans to understand.
> >
> > Whichever Kalle prefers, I just want my CI green again.
>
> We already changed this in a later internal patch, which will reach the
> mainline (-next) soon. So let's skip this for now.
>
Do you have a link to your internal Git or patchwork for this?
I am interested in testing it.
- Sedat -
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-07-12 0:17 [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static Nick Desaulniers
` (2 preceding siblings ...)
2019-07-12 2:01 ` Joe Perches
@ 2019-08-01 1:21 ` Michael Ellerman
2019-08-01 7:11 ` Johannes Berg
3 siblings, 1 reply; 15+ messages in thread
From: Michael Ellerman @ 2019-08-01 1:21 UTC (permalink / raw)
To: Nick Desaulniers, kvalo, Luca Coelho
Cc: Nick Desaulniers, Arnd Bergmann, Nathan Chancellor,
Johannes Berg, Emmanuel Grumbach, Intel Linux Wireless,
David S. Miller, Shahar S Matityahu, Sara Sharon, linux-wireless,
netdev, linux-kernel, clang-built-linux
Nick Desaulniers <ndesaulniers@google.com> writes:
> Commit r353569 in prerelease Clang-9 is producing a linkage failure:
>
> ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
> in function `_iwl_fw_dbg_apply_point':
> dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'
This breakage is also seen in older GCC versions (v4.6.3 at least):
drivers/net/wireless/intel/iwlwifi/fw/dbg.c: In function 'iwl_fw_dbg_info_apply.isra.10':
drivers/net/wireless/intel/iwlwifi/fw/dbg.c:2445:3: error: call to '__compiletime_assert_2446' declared with attribute error: BUILD_BUG_ON failed: err_str[sizeof(err_str) - 2] != '\n'
drivers/net/wireless/intel/iwlwifi/fw/dbg.c:2451:3: error: call to '__compiletime_assert_2452' declared with attribute error: BUILD_BUG_ON failed: err_str[sizeof(err_str) - 2] != '\n'
drivers/net/wireless/intel/iwlwifi/fw/dbg.c: In function '_iwl_fw_dbg_apply_point':
drivers/net/wireless/intel/iwlwifi/fw/dbg.c:2789:5: error: call to '__compiletime_assert_2790' declared with attribute error: BUILD_BUG_ON failed: invalid_ap_str[sizeof(invalid_ap_str) - 2] != '\n'
drivers/net/wireless/intel/iwlwifi/fw/dbg.c:2800:5: error: call to '__compiletime_assert_2801' declared with attribute error: BUILD_BUG_ON failed: invalid_ap_str[sizeof(invalid_ap_str) - 2] != '\n'
http://kisskb.ellerman.id.au/kisskb/buildresult/13902155/
Luca, you said this was already fixed in your internal tree, and the fix
would appear soon in next, but I don't see anything in linux-next?
cheers
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-08-01 1:21 ` Michael Ellerman
@ 2019-08-01 7:11 ` Johannes Berg
2019-08-02 12:04 ` Michael Ellerman
2019-08-06 22:37 ` Nick Desaulniers
0 siblings, 2 replies; 15+ messages in thread
From: Johannes Berg @ 2019-08-01 7:11 UTC (permalink / raw)
To: Michael Ellerman, Nick Desaulniers, kvalo, Luca Coelho
Cc: Arnd Bergmann, Nathan Chancellor, Emmanuel Grumbach,
Intel Linux Wireless, David S. Miller, Shahar S Matityahu,
Sara Sharon, linux-wireless, netdev, linux-kernel,
clang-built-linux
> Luca, you said this was already fixed in your internal tree, and the fix
> would appear soon in next, but I don't see anything in linux-next?
Luca is still on vacation, but I just sent out a version of the patch we
had applied internally.
Also turns out it wasn't actually _fixed_, just _moved_, so those
internal patches wouldn't have helped anyway.
johannes
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-08-01 7:11 ` Johannes Berg
@ 2019-08-02 12:04 ` Michael Ellerman
2019-08-06 22:37 ` Nick Desaulniers
1 sibling, 0 replies; 15+ messages in thread
From: Michael Ellerman @ 2019-08-02 12:04 UTC (permalink / raw)
To: Johannes Berg, Nick Desaulniers, kvalo, Luca Coelho
Cc: Arnd Bergmann, Nathan Chancellor, Emmanuel Grumbach,
Intel Linux Wireless, David S. Miller, Shahar S Matityahu,
Sara Sharon, linux-wireless, netdev, linux-kernel,
clang-built-linux
Johannes Berg <johannes@sipsolutions.net> writes:
>> Luca, you said this was already fixed in your internal tree, and the fix
>> would appear soon in next, but I don't see anything in linux-next?
>
> Luca is still on vacation, but I just sent out a version of the patch we
> had applied internally.
Awesome, thanks.
cheers
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-08-01 7:11 ` Johannes Berg
2019-08-02 12:04 ` Michael Ellerman
@ 2019-08-06 22:37 ` Nick Desaulniers
2019-08-07 5:15 ` Nathan Chancellor
1 sibling, 1 reply; 15+ messages in thread
From: Nick Desaulniers @ 2019-08-06 22:37 UTC (permalink / raw)
To: Johannes Berg
Cc: Michael Ellerman, Kalle Valo, Luca Coelho, Arnd Bergmann,
Nathan Chancellor, Emmanuel Grumbach, Intel Linux Wireless,
David S. Miller, Shahar S Matityahu, Sara Sharon, linux-wireless,
netdev, LKML, clang-built-linux
On Thu, Aug 1, 2019 at 12:11 AM Johannes Berg <johannes@sipsolutions.net> wrote:
>
>
> > Luca, you said this was already fixed in your internal tree, and the fix
> > would appear soon in next, but I don't see anything in linux-next?
>
> Luca is still on vacation, but I just sent out a version of the patch we
> had applied internally.
>
> Also turns out it wasn't actually _fixed_, just _moved_, so those
> internal patches wouldn't have helped anyway.
Thanks for the report. Do you have a link?
I'll rebase my patch then.
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-08-06 22:37 ` Nick Desaulniers
@ 2019-08-07 5:15 ` Nathan Chancellor
2019-08-07 5:24 ` Luciano Coelho
2019-08-07 9:18 ` Joe Perches
0 siblings, 2 replies; 15+ messages in thread
From: Nathan Chancellor @ 2019-08-07 5:15 UTC (permalink / raw)
To: Nick Desaulniers
Cc: Johannes Berg, Michael Ellerman, Kalle Valo, Luca Coelho,
Arnd Bergmann, Emmanuel Grumbach, Intel Linux Wireless,
David S. Miller, Shahar S Matityahu, Sara Sharon, linux-wireless,
netdev, LKML, clang-built-linux
On Tue, Aug 06, 2019 at 03:37:42PM -0700, Nick Desaulniers wrote:
> On Thu, Aug 1, 2019 at 12:11 AM Johannes Berg <johannes@sipsolutions.net> wrote:
> >
> >
> > > Luca, you said this was already fixed in your internal tree, and the fix
> > > would appear soon in next, but I don't see anything in linux-next?
> >
> > Luca is still on vacation, but I just sent out a version of the patch we
> > had applied internally.
> >
> > Also turns out it wasn't actually _fixed_, just _moved_, so those
> > internal patches wouldn't have helped anyway.
>
> Thanks for the report. Do you have a link?
> I'll rebase my patch then.
> --
> Thanks,
> ~Nick Desaulniers
Just for everyone else (since I commented on our issue tracker), this is
now fixed in Linus's tree as of commit 1f6607250331 ("iwlwifi: dbg_ini:
fix compile time assert build errors").
Cheers,
Nathan
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-08-07 5:15 ` Nathan Chancellor
@ 2019-08-07 5:24 ` Luciano Coelho
2019-08-07 9:18 ` Joe Perches
1 sibling, 0 replies; 15+ messages in thread
From: Luciano Coelho @ 2019-08-07 5:24 UTC (permalink / raw)
To: Nathan Chancellor, Nick Desaulniers
Cc: Johannes Berg, Michael Ellerman, Kalle Valo, Arnd Bergmann,
Emmanuel Grumbach, Intel Linux Wireless, David S. Miller,
Shahar S Matityahu, Sara Sharon, linux-wireless, netdev, LKML,
clang-built-linux
On Tue, 2019-08-06 at 22:15 -0700, Nathan Chancellor wrote:
> On Tue, Aug 06, 2019 at 03:37:42PM -0700, Nick Desaulniers wrote:
> > On Thu, Aug 1, 2019 at 12:11 AM Johannes Berg <johannes@sipsolutions.net> wrote:
> > >
> > > > Luca, you said this was already fixed in your internal tree, and the fix
> > > > would appear soon in next, but I don't see anything in linux-next?
> > >
> > > Luca is still on vacation, but I just sent out a version of the patch we
> > > had applied internally.
> > >
> > > Also turns out it wasn't actually _fixed_, just _moved_, so those
> > > internal patches wouldn't have helped anyway.
> >
> > Thanks for the report. Do you have a link?
> > I'll rebase my patch then.
> > --
> > Thanks,
> > ~Nick Desaulniers
>
> Just for everyone else (since I commented on our issue tracker), this is
> now fixed in Linus's tree as of commit 1f6607250331 ("iwlwifi: dbg_ini:
> fix compile time assert build errors").
Yes, thanks Nathan! I was just digging for this patch to reply to you,
I'm still catching up with what happened during my vacations.
--
Cheers,
Luca.
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static
2019-08-07 5:15 ` Nathan Chancellor
2019-08-07 5:24 ` Luciano Coelho
@ 2019-08-07 9:18 ` Joe Perches
1 sibling, 0 replies; 15+ messages in thread
From: Joe Perches @ 2019-08-07 9:18 UTC (permalink / raw)
To: Nathan Chancellor, Nick Desaulniers
Cc: Johannes Berg, Michael Ellerman, Kalle Valo, Luca Coelho,
Arnd Bergmann, Emmanuel Grumbach, Intel Linux Wireless,
David S. Miller, Shahar S Matityahu, Sara Sharon, linux-wireless,
netdev, LKML, clang-built-linux
On Tue, 2019-08-06 at 22:15 -0700, Nathan Chancellor wrote:
> Just for everyone else (since I commented on our issue tracker), this is
> now fixed in Linus's tree as of commit 1f6607250331 ("iwlwifi: dbg_ini:
> fix compile time assert build errors").
I think this change is incomplete and suggest you add this
to remove the use of another const char * format.
---
drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index 4d81776f576d..6b15e2e8cd37 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -2593,20 +2593,20 @@ static void iwl_fw_dbg_update_regions(struct iwl_fw_runtime *fwrt,
{
void *iter = (void *)tlv->region_config;
int i, size = le32_to_cpu(tlv->num_regions);
- const char *err_st =
- "WRT: ext=%d. Invalid region %s %d for apply point %d\n";
for (i = 0; i < size; i++) {
struct iwl_fw_ini_region_cfg *reg = iter, **active;
int id = le32_to_cpu(reg->region_id);
u32 type = le32_to_cpu(reg->region_type);
- if (WARN(id >= ARRAY_SIZE(fwrt->dump.active_regs), err_st, ext,
- "id", id, pnt))
+ if (WARN(id >= ARRAY_SIZE(fwrt->dump.active_regs),
+ "WRT: ext=%d. Invalid region id %d for apply point %d\n",
+ ext, id, pnt))
break;
- if (WARN(type == 0 || type >= IWL_FW_INI_REGION_NUM, err_st,
- ext, "type", type, pnt))
+ if (WARN(type == 0 || type >= IWL_FW_INI_REGION_NUM,
+ "WRT: ext=%d. Invalid region type %d for apply point %d\n",
+ ext, type, pnt))
break;
active = &fwrt->dump.active_regs[id];
^ permalink raw reply related [flat|nested] 15+ messages in thread
end of thread, other threads:[~2019-08-07 9:18 UTC | newest]
Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
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2019-07-12 0:17 [PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static Nick Desaulniers
2019-07-12 0:18 ` Nick Desaulniers
2019-07-12 0:28 ` Nathan Chancellor
2019-07-12 2:01 ` Joe Perches
2019-07-16 17:28 ` Nick Desaulniers
2019-07-16 21:14 ` Luca Coelho
2019-07-16 21:18 ` Nick Desaulniers
2019-07-24 15:38 ` Sedat Dilek
2019-08-01 1:21 ` Michael Ellerman
2019-08-01 7:11 ` Johannes Berg
2019-08-02 12:04 ` Michael Ellerman
2019-08-06 22:37 ` Nick Desaulniers
2019-08-07 5:15 ` Nathan Chancellor
2019-08-07 5:24 ` Luciano Coelho
2019-08-07 9:18 ` Joe Perches
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