* [PATCH] libkmod: assign values to variables to fix warnings
@ 2021-01-21 7:06 Shuo Wang
2021-01-23 19:04 ` Lucas De Marchi
0 siblings, 1 reply; 5+ messages in thread
From: Shuo Wang @ 2021-01-21 7:06 UTC (permalink / raw)
To: lucas.de.marchi, patchwork-bot, linux-modules; +Cc: hushiyuan
Dear Lucas,
Thanks for your reply. I was wondering if these changes will
be merged in the future?
Best regards,
Shuo
>gcc version 7.3.0 (GCC)
>
>>what compiler?
>>>libkmod/libkmod.c: In function 'kmod_lookup_alias_is_builtin':
>>>./shared/util.h:73:9: warning: 'line' may be used uninitialized in this function [-Wmaybe-uninitialized]
>>> free(*(void**) p);
>>> ^~~~~~~~~~~~~~~~~
>>>libkmod/libkmod.c:581:23: note: 'line' was declared here
>>> _cleanup_free_ char *line;
>>> ^~~~
>>>In file included from libkmod/libkmod-module.c:42:0:
>>>libkmod/libkmod-module.c: In function 'kmod_module_probe_insert_module':
>>>./shared/util.h:73:9: warning: 'cmd' may be used uninitialized in this function [-Wmaybe-uninitialized]
>>> free(*(void**) p);
>>> ^~~~~~~~~~~~~~~~~
>>>libkmod/libkmod-module.c:1009:23: note: 'cmd' was declared here
>>> _cleanup_free_ char *cmd;
>>>
>>>---
>>> libkmod/libkmod-module.c | 2 +-
>>> libkmod/libkmod.c | 2 +-
>>> 2 files changed, 2 insertions(+), 2 deletions(-)
>>>
>>>diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
>>>index 76a6dc3..2e973b5 100644
>>>--- a/libkmod/libkmod-module.c
>>>+++ b/libkmod/libkmod-module.c
>>>@@ -1006,7 +1006,7 @@ static int module_do_install_commands(struct kmod_module *mod,
>>> {
>>> const char *command = kmod_module_get_install_commands(mod);
>>> char *p;
>>>- _cleanup_free_ char *cmd;
>>>+ _cleanup_free_ char *cmd = NULL;
>>> int err;
>>> size_t cmdlen, options_len, varlen;
>>>
>>>diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
>>>index 43423d6..66e658c 100644
>>>--- a/libkmod/libkmod.c
>>>+++ b/libkmod/libkmod.c
>>>@@ -578,7 +578,7 @@ finish:
>>>
>>> bool kmod_lookup_alias_is_builtin(struct kmod_ctx *ctx, const char *name)
>>> {
>>>- _cleanup_free_ char *line;
>>>+ _cleanup_free_ char *line = NULL;
>>>
>>> line = lookup_builtin_file(ctx, name);
>>>
>>>--
>>>2.23.0
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] libkmod: assign values to variables to fix warnings
2021-01-21 7:06 [PATCH] libkmod: assign values to variables to fix warnings Shuo Wang
@ 2021-01-23 19:04 ` Lucas De Marchi
0 siblings, 0 replies; 5+ messages in thread
From: Lucas De Marchi @ 2021-01-23 19:04 UTC (permalink / raw)
To: Shuo Wang; +Cc: patchwork-bot, linux-modules, hushiyuan
On Wed, Jan 20, 2021 at 11:06 PM Shuo Wang <wangshuo47@huawei.com> wrote:
>
>
> Dear Lucas,
>
> Thanks for your reply. I was wondering if these changes will
> be merged in the future?
It seems those errors are actually compiler mistakes. Aren't there
updates to the compiler? What distro is shipping gcc 7.3.0??
See below.
>
> Best regards,
> Shuo
>
> >gcc version 7.3.0 (GCC)
> >
> >>what compiler?
> >>>libkmod/libkmod.c: In function 'kmod_lookup_alias_is_builtin':
> >>>./shared/util.h:73:9: warning: 'line' may be used uninitialized in this function [-Wmaybe-uninitialized]
> >>> free(*(void**) p);
> >>> ^~~~~~~~~~~~~~~~~
> >>>libkmod/libkmod.c:581:23: note: 'line' was declared here
> >>> _cleanup_free_ char *line;
> >>> ^~~~
> >>>In file included from libkmod/libkmod-module.c:42:0:
> >>>libkmod/libkmod-module.c: In function 'kmod_module_probe_insert_module':
> >>>./shared/util.h:73:9: warning: 'cmd' may be used uninitialized in this function [-Wmaybe-uninitialized]
> >>> free(*(void**) p);
> >>> ^~~~~~~~~~~~~~~~~
> >>>libkmod/libkmod-module.c:1009:23: note: 'cmd' was declared here
> >>> _cleanup_free_ char *cmd;
> >>>
> >>>---
> >>> libkmod/libkmod-module.c | 2 +-
> >>> libkmod/libkmod.c | 2 +-
> >>> 2 files changed, 2 insertions(+), 2 deletions(-)
> >>>
> >>>diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
> >>>index 76a6dc3..2e973b5 100644
> >>>--- a/libkmod/libkmod-module.c
> >>>+++ b/libkmod/libkmod-module.c
> >>>@@ -1006,7 +1006,7 @@ static int module_do_install_commands(struct kmod_module *mod,
> >>> {
> >>> const char *command = kmod_module_get_install_commands(mod);
> >>> char *p;
> >>>- _cleanup_free_ char *cmd;
> >>>+ _cleanup_free_ char *cmd = NULL;
> >>> int err;
> >>> size_t cmdlen, options_len, varlen;
> >>>
> >>>diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
> >>>index 43423d6..66e658c 100644
> >>>--- a/libkmod/libkmod.c
> >>>+++ b/libkmod/libkmod.c
> >>>@@ -578,7 +578,7 @@ finish:
> >>>
> >>> bool kmod_lookup_alias_is_builtin(struct kmod_ctx *ctx, const char *name)
> >>> {
> >>>- _cleanup_free_ char *line;
> >>>+ _cleanup_free_ char *line = NULL;
> >>>
> >>> line = lookup_builtin_file(ctx, name);
line is declared above and just assigned here, the initial NULL makes
no difference.
Lucas De Marchi
> >>>
> >>>--
> >>>2.23.0
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH] libkmod: assign values to variables to fix warnings
@ 2021-01-11 14:13 Shuo Wang
0 siblings, 0 replies; 5+ messages in thread
From: Shuo Wang @ 2021-01-11 14:13 UTC (permalink / raw)
To: lucas.de.marchi, patchwork-bot, linux-modules; +Cc: hushiyuan
gcc version 7.3.0 (GCC)
>what compiler?
>>libkmod/libkmod.c: In function 'kmod_lookup_alias_is_builtin':
>>./shared/util.h:73:9: warning: 'line' may be used uninitialized in this function [-Wmaybe-uninitialized]
>> free(*(void**) p);
>> ^~~~~~~~~~~~~~~~~
>>libkmod/libkmod.c:581:23: note: 'line' was declared here
>> _cleanup_free_ char *line;
>> ^~~~
>>In file included from libkmod/libkmod-module.c:42:0:
>>libkmod/libkmod-module.c: In function 'kmod_module_probe_insert_module':
>>./shared/util.h:73:9: warning: 'cmd' may be used uninitialized in this function [-Wmaybe-uninitialized]
>> free(*(void**) p);
>> ^~~~~~~~~~~~~~~~~
>>libkmod/libkmod-module.c:1009:23: note: 'cmd' was declared here
>> _cleanup_free_ char *cmd;
>>
>>---
>> libkmod/libkmod-module.c | 2 +-
>> libkmod/libkmod.c | 2 +-
>> 2 files changed, 2 insertions(+), 2 deletions(-)
>>
>>diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
>>index 76a6dc3..2e973b5 100644
>>--- a/libkmod/libkmod-module.c
>>+++ b/libkmod/libkmod-module.c
>>@@ -1006,7 +1006,7 @@ static int module_do_install_commands(struct kmod_module *mod,
>> {
>> const char *command = kmod_module_get_install_commands(mod);
>> char *p;
>>- _cleanup_free_ char *cmd;
>>+ _cleanup_free_ char *cmd = NULL;
>> int err;
>> size_t cmdlen, options_len, varlen;
>>
>>diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
>>index 43423d6..66e658c 100644
>>--- a/libkmod/libkmod.c
>>+++ b/libkmod/libkmod.c
>>@@ -578,7 +578,7 @@ finish:
>>
>> bool kmod_lookup_alias_is_builtin(struct kmod_ctx *ctx, const char *name)
>> {
>>- _cleanup_free_ char *line;
>>+ _cleanup_free_ char *line = NULL;
>>
>> line = lookup_builtin_file(ctx, name);
>>
>>--
>>2.23.0
^ permalink raw reply [flat|nested] 5+ messages in thread* [PATCH] libkmod: assign values to variables to fix warnings
@ 2021-01-08 7:22 Shuo Wang
2021-01-11 13:09 ` Lucas De Marchi
0 siblings, 1 reply; 5+ messages in thread
From: Shuo Wang @ 2021-01-08 7:22 UTC (permalink / raw)
To: lucas.de.marchi, patchwork-bot, linux-modules; +Cc: hushiyuan
libkmod/libkmod.c: In function 'kmod_lookup_alias_is_builtin':
./shared/util.h:73:9: warning: 'line' may be used uninitialized in this function [-Wmaybe-uninitialized]
free(*(void**) p);
^~~~~~~~~~~~~~~~~
libkmod/libkmod.c:581:23: note: 'line' was declared here
_cleanup_free_ char *line;
^~~~
In file included from libkmod/libkmod-module.c:42:0:
libkmod/libkmod-module.c: In function 'kmod_module_probe_insert_module':
./shared/util.h:73:9: warning: 'cmd' may be used uninitialized in this function [-Wmaybe-uninitialized]
free(*(void**) p);
^~~~~~~~~~~~~~~~~
libkmod/libkmod-module.c:1009:23: note: 'cmd' was declared here
_cleanup_free_ char *cmd;
---
libkmod/libkmod-module.c | 2 +-
libkmod/libkmod.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
index 76a6dc3..2e973b5 100644
--- a/libkmod/libkmod-module.c
+++ b/libkmod/libkmod-module.c
@@ -1006,7 +1006,7 @@ static int module_do_install_commands(struct kmod_module *mod,
{
const char *command = kmod_module_get_install_commands(mod);
char *p;
- _cleanup_free_ char *cmd;
+ _cleanup_free_ char *cmd = NULL;
int err;
size_t cmdlen, options_len, varlen;
diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
index 43423d6..66e658c 100644
--- a/libkmod/libkmod.c
+++ b/libkmod/libkmod.c
@@ -578,7 +578,7 @@ finish:
bool kmod_lookup_alias_is_builtin(struct kmod_ctx *ctx, const char *name)
{
- _cleanup_free_ char *line;
+ _cleanup_free_ char *line = NULL;
line = lookup_builtin_file(ctx, name);
--
2.23.0
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH] libkmod: assign values to variables to fix warnings
2021-01-08 7:22 Shuo Wang
@ 2021-01-11 13:09 ` Lucas De Marchi
0 siblings, 0 replies; 5+ messages in thread
From: Lucas De Marchi @ 2021-01-11 13:09 UTC (permalink / raw)
To: Shuo Wang; +Cc: patchwork-bot, linux-modules, hushiyuan
what compiler?
On Thu, Jan 7, 2021 at 11:22 PM Shuo Wang <wangshuo47@huawei.com> wrote:
>
> libkmod/libkmod.c: In function 'kmod_lookup_alias_is_builtin':
> ./shared/util.h:73:9: warning: 'line' may be used uninitialized in this function [-Wmaybe-uninitialized]
> free(*(void**) p);
> ^~~~~~~~~~~~~~~~~
> libkmod/libkmod.c:581:23: note: 'line' was declared here
> _cleanup_free_ char *line;
> ^~~~
> In file included from libkmod/libkmod-module.c:42:0:
> libkmod/libkmod-module.c: In function 'kmod_module_probe_insert_module':
> ./shared/util.h:73:9: warning: 'cmd' may be used uninitialized in this function [-Wmaybe-uninitialized]
> free(*(void**) p);
> ^~~~~~~~~~~~~~~~~
> libkmod/libkmod-module.c:1009:23: note: 'cmd' was declared here
> _cleanup_free_ char *cmd;
>
> ---
> libkmod/libkmod-module.c | 2 +-
> libkmod/libkmod.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
> index 76a6dc3..2e973b5 100644
> --- a/libkmod/libkmod-module.c
> +++ b/libkmod/libkmod-module.c
> @@ -1006,7 +1006,7 @@ static int module_do_install_commands(struct kmod_module *mod,
> {
> const char *command = kmod_module_get_install_commands(mod);
> char *p;
> - _cleanup_free_ char *cmd;
> + _cleanup_free_ char *cmd = NULL;
> int err;
> size_t cmdlen, options_len, varlen;
>
> diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c
> index 43423d6..66e658c 100644
> --- a/libkmod/libkmod.c
> +++ b/libkmod/libkmod.c
> @@ -578,7 +578,7 @@ finish:
>
> bool kmod_lookup_alias_is_builtin(struct kmod_ctx *ctx, const char *name)
> {
> - _cleanup_free_ char *line;
> + _cleanup_free_ char *line = NULL;
>
> line = lookup_builtin_file(ctx, name);
line is assigned here. Why is this giving you a warning? I remember
seeing these warnings that ended up being fixed
in gcc some years ago.
Lucas De Marchi
>
> --
> 2.23.0
>
^ permalink raw reply [flat|nested] 5+ messages in thread
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2021-01-21 7:06 [PATCH] libkmod: assign values to variables to fix warnings Shuo Wang
2021-01-23 19:04 ` Lucas De Marchi
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2021-01-11 14:13 Shuo Wang
2021-01-08 7:22 Shuo Wang
2021-01-11 13:09 ` Lucas De Marchi
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