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xfs: fix xfs_debug warnings 

For a CONFIG_XFS_DEBUG=n build gcc complains about statements with no
effect in xfs_debug:

fs/xfs/quota/xfs_qm_syscalls.c: In function 'xfs_qm_scall_trunc_qfiles':
fs/xfs/quota/xfs_qm_syscalls.c:291:3: warning: statement with no effect

The reason for that is that the various new xfs message functions have a
return value which is never used, and in case of the non-debug build
xfs_debug the macro evaluates to a plain 0 which produces the above
warnings.  This can be fixed by turning xfs_debug into an inline function
instead of a macro, but in addition to that I've also changed all the
message helpers to return void as we never use their return values.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Christoph Hellwig 2011-04-02 18:13:40 +00:00 committed by Alex Elder
parent ecb697c16c
commit 957935dcd8
2 changed files with 22 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
fs/xfs/linux-2.6/xfs_message.c
View File

@ -28,53 +28,47 @@
/* /*
* XFS logging functions * XFS logging functions
*/ */
static int static void
__xfs_printk( __xfs_printk(
const char *level, const char *level,
const struct xfs_mount *mp, const struct xfs_mount *mp,
struct va_format *vaf) struct va_format *vaf)
{ {
if (mp && mp->m_fsname) if (mp && mp->m_fsname)
return printk("%sXFS (%s): %pV\n", level, mp->m_fsname, vaf); printk("%sXFS (%s): %pV\n", level, mp->m_fsname, vaf);
return printk("%sXFS: %pV\n", level, vaf); printk("%sXFS: %pV\n", level, vaf);
} }
int xfs_printk( void xfs_printk(
const char *level, const char *level,
const struct xfs_mount *mp, const struct xfs_mount *mp,
const char *fmt, ...) const char *fmt, ...)
{ {
struct va_format vaf; struct va_format vaf;
va_list args; va_list args;
int r;
va_start(args, fmt); va_start(args, fmt);
vaf.fmt = fmt; vaf.fmt = fmt;
vaf.va = &args; vaf.va = &args;
r = __xfs_printk(level, mp, &vaf); __xfs_printk(level, mp, &vaf);
va_end(args); va_end(args);
return r;
} }
#define define_xfs_printk_level(func, kern_level) \ #define define_xfs_printk_level(func, kern_level) \
int func(const struct xfs_mount *mp, const char *fmt, ...) \ void func(const struct xfs_mount *mp, const char *fmt, ...) \
{ \ { \
struct va_format vaf; \ struct va_format vaf; \
va_list args; \ va_list args; \
int r; \
\ \
va_start(args, fmt); \ va_start(args, fmt); \
\ \
vaf.fmt = fmt; \ vaf.fmt = fmt; \
vaf.va = &args; \ vaf.va = &args; \
\ \
r = __xfs_printk(kern_level, mp, &vaf); \ __xfs_printk(kern_level, mp, &vaf); \
va_end(args); \ va_end(args); \
\
return r; \
} \ } \
define_xfs_printk_level(xfs_emerg, KERN_EMERG); define_xfs_printk_level(xfs_emerg, KERN_EMERG);
@ -88,7 +82,7 @@ define_xfs_printk_level(xfs_info, KERN_INFO);
define_xfs_printk_level(xfs_debug, KERN_DEBUG); define_xfs_printk_level(xfs_debug, KERN_DEBUG);
#endif #endif
int void
xfs_alert_tag( xfs_alert_tag(
const struct xfs_mount *mp, const struct xfs_mount *mp,
int panic_tag, int panic_tag,
@ -97,7 +91,6 @@ xfs_alert_tag(
struct va_format vaf; struct va_format vaf;
va_list args; va_list args;
int do_panic = 0; int do_panic = 0;
int r;
if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) { if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) {
xfs_printk(KERN_ALERT, mp, xfs_printk(KERN_ALERT, mp,
@ -110,12 +103,10 @@ xfs_alert_tag(
vaf.fmt = fmt; vaf.fmt = fmt;
vaf.va = &args; vaf.va = &args;
r = __xfs_printk(KERN_ALERT, mp, &vaf); __xfs_printk(KERN_ALERT, mp, &vaf);
va_end(args); va_end(args);
BUG_ON(do_panic); BUG_ON(do_panic);
return r;
} }
void void

24
fs/xfs/linux-2.6/xfs_message.h
View File

@ -3,32 +3,34 @@
struct xfs_mount; struct xfs_mount;
extern int xfs_printk(const char *level, const struct xfs_mount *mp, extern void xfs_printk(const char *level, const struct xfs_mount *mp,
const char *fmt, ...) const char *fmt, ...)
__attribute__ ((format (printf, 3, 4))); __attribute__ ((format (printf, 3, 4)));
extern int xfs_emerg(const struct xfs_mount *mp, const char *fmt, ...) extern void xfs_emerg(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))); __attribute__ ((format (printf, 2, 3)));
extern int xfs_alert(const struct xfs_mount *mp, const char *fmt, ...) extern void xfs_alert(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))); __attribute__ ((format (printf, 2, 3)));
extern int xfs_alert_tag(const struct xfs_mount *mp, int tag, extern void xfs_alert_tag(const struct xfs_mount *mp, int tag,
const char *fmt, ...) const char *fmt, ...)
__attribute__ ((format (printf, 3, 4))); __attribute__ ((format (printf, 3, 4)));
extern int xfs_crit(const struct xfs_mount *mp, const char *fmt, ...) extern void xfs_crit(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))); __attribute__ ((format (printf, 2, 3)));
extern int xfs_err(const struct xfs_mount *mp, const char *fmt, ...) extern void xfs_err(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))); __attribute__ ((format (printf, 2, 3)));
extern int xfs_warn(const struct xfs_mount *mp, const char *fmt, ...) extern void xfs_warn(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))); __attribute__ ((format (printf, 2, 3)));
extern int xfs_notice(const struct xfs_mount *mp, const char *fmt, ...) extern void xfs_notice(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))); __attribute__ ((format (printf, 2, 3)));
extern int xfs_info(const struct xfs_mount *mp, const char *fmt, ...) extern void xfs_info(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))); __attribute__ ((format (printf, 2, 3)));
#ifdef DEBUG #ifdef DEBUG
extern int xfs_debug(const struct xfs_mount *mp, const char *fmt, ...) extern void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))); __attribute__ ((format (printf, 2, 3)));
#else #else
#define xfs_debug(mp, fmt, ...) (0) static inline void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
{
}
#endif #endif
extern void assfail(char *expr, char *f, int l); extern void assfail(char *expr, char *f, int l);