* [PATCH v3] gcov: fix when CONFIG_MODULES is not set
@ 2019-04-02 3:09 trong
2019-04-02 4:47 ` Randy Dunlap
2019-04-03 15:27 ` Matthew Wilcox
0 siblings, 2 replies; 4+ messages in thread
From: trong @ 2019-04-02 3:09 UTC (permalink / raw)
To: oberpar, akpm
Cc: ndesaulniers, ghackmann, linux-mm, kbuild-all, rdunlap, lkp,
linux-kernel, Tri Vo
From: Tri Vo <trong@android.com>
Fixes: 8c3d220cb6b5 ("gcov: clang support")
Cc: Greg Hackmann <ghackmann@android.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: linux-mm@kvack.org
Cc: kbuild-all@01.org
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kbuild test robot <lkp@intel.com>
Link: https://marc.info/?l=linux-mm&m=155384681109231&w=2
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Tri Vo <trong@android.com>
---
kernel/gcov/clang.c | 4 ++++
kernel/gcov/gcc_3_4.c | 4 ++++
kernel/gcov/gcc_4_7.c | 4 ++++
3 files changed, 12 insertions(+)
diff --git a/kernel/gcov/clang.c b/kernel/gcov/clang.c
index 125c50397ba2..cfb9ce5e0fed 100644
--- a/kernel/gcov/clang.c
+++ b/kernel/gcov/clang.c
@@ -223,7 +223,11 @@ void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
*/
bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
{
+#ifdef CONFIG_MODULES
return within_module((unsigned long)info->filename, mod);
+#else
+ return false;
+#endif
}
/* Symbolic links to be created for each profiling data file. */
diff --git a/kernel/gcov/gcc_3_4.c b/kernel/gcov/gcc_3_4.c
index 801ee4b0b969..8fc30f178351 100644
--- a/kernel/gcov/gcc_3_4.c
+++ b/kernel/gcov/gcc_3_4.c
@@ -146,7 +146,11 @@ void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
*/
bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
{
+#ifdef CONFIG_MODULES
return within_module((unsigned long)info, mod);
+#else
+ return false;
+#endif
}
/* Symbolic links to be created for each profiling data file. */
diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c
index ec37563674d6..0b6886d4a4dd 100644
--- a/kernel/gcov/gcc_4_7.c
+++ b/kernel/gcov/gcc_4_7.c
@@ -159,7 +159,11 @@ void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
*/
bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
{
+#ifdef CONFIG_MODULES
return within_module((unsigned long)info, mod);
+#else
+ return false;
+#endif
}
/* Symbolic links to be created for each profiling data file. */
--
2.21.0.392.gf8f6787159e-goog
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v3] gcov: fix when CONFIG_MODULES is not set
2019-04-02 3:09 [PATCH v3] gcov: fix when CONFIG_MODULES is not set trong
@ 2019-04-02 4:47 ` Randy Dunlap
2019-04-03 15:27 ` Matthew Wilcox
1 sibling, 0 replies; 4+ messages in thread
From: Randy Dunlap @ 2019-04-02 4:47 UTC (permalink / raw)
To: trong, oberpar, akpm
Cc: ndesaulniers, ghackmann, linux-mm, kbuild-all, lkp, linux-kernel
On 4/1/19 8:09 PM, trong@android.com wrote:
> From: Tri Vo <trong@android.com>
>
> Fixes: 8c3d220cb6b5 ("gcov: clang support")
>
> Cc: Greg Hackmann <ghackmann@android.com>
> Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
> Cc: linux-mm@kvack.org
> Cc: kbuild-all@01.org
> Reported-by: Randy Dunlap <rdunlap@infradead.org>
> Reported-by: kbuild test robot <lkp@intel.com>
> Link: https://marc.info/?l=linux-mm&m=155384681109231&w=2
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
> Signed-off-by: Tri Vo <trong@android.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Thanks.
> ---
> kernel/gcov/clang.c | 4 ++++
> kernel/gcov/gcc_3_4.c | 4 ++++
> kernel/gcov/gcc_4_7.c | 4 ++++
> 3 files changed, 12 insertions(+)
>
> diff --git a/kernel/gcov/clang.c b/kernel/gcov/clang.c
> index 125c50397ba2..cfb9ce5e0fed 100644
> --- a/kernel/gcov/clang.c
> +++ b/kernel/gcov/clang.c
> @@ -223,7 +223,11 @@ void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
> */
> bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
> {
> +#ifdef CONFIG_MODULES
> return within_module((unsigned long)info->filename, mod);
> +#else
> + return false;
> +#endif
> }
>
> /* Symbolic links to be created for each profiling data file. */
> diff --git a/kernel/gcov/gcc_3_4.c b/kernel/gcov/gcc_3_4.c
> index 801ee4b0b969..8fc30f178351 100644
> --- a/kernel/gcov/gcc_3_4.c
> +++ b/kernel/gcov/gcc_3_4.c
> @@ -146,7 +146,11 @@ void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
> */
> bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
> {
> +#ifdef CONFIG_MODULES
> return within_module((unsigned long)info, mod);
> +#else
> + return false;
> +#endif
> }
>
> /* Symbolic links to be created for each profiling data file. */
> diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c
> index ec37563674d6..0b6886d4a4dd 100644
> --- a/kernel/gcov/gcc_4_7.c
> +++ b/kernel/gcov/gcc_4_7.c
> @@ -159,7 +159,11 @@ void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
> */
> bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
> {
> +#ifdef CONFIG_MODULES
> return within_module((unsigned long)info, mod);
> +#else
> + return false;
> +#endif
> }
>
> /* Symbolic links to be created for each profiling data file. */
>
--
~Randy
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v3] gcov: fix when CONFIG_MODULES is not set
2019-04-02 3:09 [PATCH v3] gcov: fix when CONFIG_MODULES is not set trong
2019-04-02 4:47 ` Randy Dunlap
@ 2019-04-03 15:27 ` Matthew Wilcox
2019-04-05 17:18 ` Nick Desaulniers
1 sibling, 1 reply; 4+ messages in thread
From: Matthew Wilcox @ 2019-04-03 15:27 UTC (permalink / raw)
To: trong
Cc: oberpar, akpm, ndesaulniers, ghackmann, linux-mm, kbuild-all,
rdunlap, lkp, linux-kernel
On Tue, Apr 02, 2019 at 10:09:56AM +0700, trong@android.com wrote:
> From: Tri Vo <trong@android.com>
>
> Fixes: 8c3d220cb6b5 ("gcov: clang support")
I think this is the wrong fix. Why not simply:
+++ b/include/linux/module.h
@@ -709,6 +709,11 @@ static inline bool is_module_text_address(unsigned long addr)
return false;
}
+static inline bool within_module(unsigned long addr, const struct module *mod)
+{
+ return false;
+}
+
/* Get/put a kernel symbol (calls should be symmetric) */
#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
#define symbol_put(x) do { } while (0)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v3] gcov: fix when CONFIG_MODULES is not set
2019-04-03 15:27 ` Matthew Wilcox
@ 2019-04-05 17:18 ` Nick Desaulniers
0 siblings, 0 replies; 4+ messages in thread
From: Nick Desaulniers @ 2019-04-05 17:18 UTC (permalink / raw)
To: Matthew Wilcox, Andrew Morton
Cc: Tri Vo, Peter Oberparleiter, Greg Hackmann,
Linux Memory Management List, kbuild-all, Randy Dunlap,
kbuild test robot, LKML
On Wed, Apr 3, 2019 at 8:27 AM Matthew Wilcox <willy@infradead.org> wrote:
>
> On Tue, Apr 02, 2019 at 10:09:56AM +0700, trong@android.com wrote:
> > From: Tri Vo <trong@android.com>
> >
> > Fixes: 8c3d220cb6b5 ("gcov: clang support")
>
> I think this is the wrong fix. Why not simply:
I spoke with Tri quickly about this proposal and we agree it's a better fix.
Andrew, would you mind dropping:
https://ozlabs.org/~akpm/mmotm/broken-out/gcov-clang-support-fix.patch
?
Matthew, would you please send that patch with a commit message? Or
if you would prefer us to send with your suggested-by tag, we can do
that, too. Whichever you prefer, please let me know. Thanks for the
suggestion.
>
> +++ b/include/linux/module.h
> @@ -709,6 +709,11 @@ static inline bool is_module_text_address(unsigned long addr)
> return false;
> }
>
> +static inline bool within_module(unsigned long addr, const struct module *mod)
> +{
> + return false;
> +}
> +
> /* Get/put a kernel symbol (calls should be symmetric) */
> #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
> #define symbol_put(x) do { } while (0)
>
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 4+ messages in thread
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2019-04-02 3:09 [PATCH v3] gcov: fix when CONFIG_MODULES is not set trong
2019-04-02 4:47 ` Randy Dunlap
2019-04-03 15:27 ` Matthew Wilcox
2019-04-05 17:18 ` Nick Desaulniers
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