Re: [PATCH] [v2] audit: avoid -Wempty-body warning
On Mon, Mar 22, 2021 at 12:28 PM Arnd Bergmann wrote: > > From: Arnd Bergmann > > gcc warns about an empty statement when audit_remove_mark is defined to > nothing: > > kernel/auditfilter.c: In function 'audit_data_to_entry': > kernel/auditfilter.c:609:51: error: suggest braces around empty body in an > 'if' statement [-Werror=empty-body] > 609 | audit_remove_mark(entry->rule.exe); /* that's the > template one */ > | ^ > > Change the macros to use the usual "do { } while (0)" instead, and change a > few more that were (void)0, for consistency. > > Signed-off-by: Arnd Bergmann > --- > v2: convert two more macros > --- > kernel/audit.h | 12 ++-- > 1 file changed, 6 insertions(+), 6 deletions(-) Merged into audit/next, thanks. -- paul moore www.paul-moore.com
Re: [PATCH] [v2] audit: avoid -Wempty-body warning
On 2021-03-22 17:27, Arnd Bergmann wrote: > From: Arnd Bergmann > > gcc warns about an empty statement when audit_remove_mark is defined to > nothing: > > kernel/auditfilter.c: In function 'audit_data_to_entry': > kernel/auditfilter.c:609:51: error: suggest braces around empty body in an > 'if' statement [-Werror=empty-body] > 609 | audit_remove_mark(entry->rule.exe); /* that's the > template one */ > | ^ > > Change the macros to use the usual "do { } while (0)" instead, and change a > few more that were (void)0, for consistency. > > Signed-off-by: Arnd Bergmann Acked-by: Richard Guy Briggs > --- > v2: convert two more macros > --- > kernel/audit.h | 12 ++-- > 1 file changed, 6 insertions(+), 6 deletions(-) > > diff --git a/kernel/audit.h b/kernel/audit.h > index 3b9c0945225a..1522e100fd17 100644 > --- a/kernel/audit.h > +++ b/kernel/audit.h > @@ -292,8 +292,8 @@ extern void audit_filter_inodes(struct task_struct *tsk, > extern struct list_head *audit_killed_trees(void); > #else /* CONFIG_AUDITSYSCALL */ > #define auditsc_get_stamp(c, t, s) 0 > -#define audit_put_watch(w) {} > -#define audit_get_watch(w) {} > +#define audit_put_watch(w) do { } while (0) > +#define audit_get_watch(w) do { } while (0) > #define audit_to_watch(k, p, l, o) (-EINVAL) > #define audit_add_watch(k, l) (-EINVAL) > #define audit_remove_watch_rule(k) BUG() > @@ -302,8 +302,8 @@ extern struct list_head *audit_killed_trees(void); > > #define audit_alloc_mark(k, p, l) (ERR_PTR(-EINVAL)) > #define audit_mark_path(m) "" > -#define audit_remove_mark(m) > -#define audit_remove_mark_rule(k) > +#define audit_remove_mark(m) do { } while (0) > +#define audit_remove_mark_rule(k) do { } while (0) > #define audit_mark_compare(m, i, d) 0 > #define audit_exe_compare(t, m) (-EINVAL) > #define audit_dupe_exe(n, o) (-EINVAL) > @@ -311,8 +311,8 @@ extern struct list_head *audit_killed_trees(void); > #define audit_remove_tree_rule(rule) BUG() > #define audit_add_tree_rule(rule) -EINVAL > #define audit_make_tree(rule, str, op) -EINVAL > -#define audit_trim_trees() (void)0 > -#define audit_put_tree(tree) (void)0 > +#define audit_trim_trees() do { } while (0) > +#define audit_put_tree(tree) do { } while (0) > #define audit_tag_tree(old, new) -EINVAL > #define audit_tree_path(rule) "" /* never called */ > #define audit_kill_trees(context) BUG() > -- > 2.29.2 > - RGB -- Richard Guy Briggs Sr. S/W Engineer, Kernel Security, Base Operating Systems Remote, Ottawa, Red Hat Canada IRC: rgb, SunRaycer Voice: +1.647.777.2635, Internal: (81) 32635
[PATCH] [v2] audit: avoid -Wempty-body warning
From: Arnd Bergmann gcc warns about an empty statement when audit_remove_mark is defined to nothing: kernel/auditfilter.c: In function 'audit_data_to_entry': kernel/auditfilter.c:609:51: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body] 609 | audit_remove_mark(entry->rule.exe); /* that's the template one */ | ^ Change the macros to use the usual "do { } while (0)" instead, and change a few more that were (void)0, for consistency. Signed-off-by: Arnd Bergmann --- v2: convert two more macros --- kernel/audit.h | 12 ++-- 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/kernel/audit.h b/kernel/audit.h index 3b9c0945225a..1522e100fd17 100644 --- a/kernel/audit.h +++ b/kernel/audit.h @@ -292,8 +292,8 @@ extern void audit_filter_inodes(struct task_struct *tsk, extern struct list_head *audit_killed_trees(void); #else /* CONFIG_AUDITSYSCALL */ #define auditsc_get_stamp(c, t, s) 0 -#define audit_put_watch(w) {} -#define audit_get_watch(w) {} +#define audit_put_watch(w) do { } while (0) +#define audit_get_watch(w) do { } while (0) #define audit_to_watch(k, p, l, o) (-EINVAL) #define audit_add_watch(k, l) (-EINVAL) #define audit_remove_watch_rule(k) BUG() @@ -302,8 +302,8 @@ extern struct list_head *audit_killed_trees(void); #define audit_alloc_mark(k, p, l) (ERR_PTR(-EINVAL)) #define audit_mark_path(m) "" -#define audit_remove_mark(m) -#define audit_remove_mark_rule(k) +#define audit_remove_mark(m) do { } while (0) +#define audit_remove_mark_rule(k) do { } while (0) #define audit_mark_compare(m, i, d) 0 #define audit_exe_compare(t, m) (-EINVAL) #define audit_dupe_exe(n, o) (-EINVAL) @@ -311,8 +311,8 @@ extern struct list_head *audit_killed_trees(void); #define audit_remove_tree_rule(rule) BUG() #define audit_add_tree_rule(rule) -EINVAL #define audit_make_tree(rule, str, op) -EINVAL -#define audit_trim_trees() (void)0 -#define audit_put_tree(tree) (void)0 +#define audit_trim_trees() do { } while (0) +#define audit_put_tree(tree) do { } while (0) #define audit_tag_tree(old, new) -EINVAL #define audit_tree_path(rule) "" /* never called */ #define audit_kill_trees(context) BUG() -- 2.29.2