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| author | Gu Zheng <guz.fnst@cn.fujitsu.com> | 2013-11-04 18:21:05 +0800 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-11-06 16:31:27 -0600 |
| commit | 359d992bcd398273637cd9edde10afca953783c4 (patch) | |
| tree | bfe6012116dc8b8d59d16bc517d0c94fa24abae9 /fs/xfs/kmem.h | |
| parent | d123031a5673cd38a85ce66cc07243dfe5f424c9 (diff) | |
| download | blackbird-op-linux-359d992bcd398273637cd9edde10afca953783c4.tar.gz blackbird-op-linux-359d992bcd398273637cd9edde10afca953783c4.zip | |
xfs: simplify kmem_{zone_}zalloc
Introduce flag KM_ZERO which is used to alloc zeroed entry, and convert
kmem_{zone_}zalloc to call kmem_{zone_}alloc() with KM_ZERO directly,
in order to avoid the setting to zero step.
And following Dave's suggestion, make kmem_{zone_}zalloc static inline
into kmem.h as they're now just a simple wrapper.
V2:
Make kmem_{zone_}zalloc static inline into kmem.h as Dave suggested.
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/kmem.h')
| -rw-r--r-- | fs/xfs/kmem.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/fs/xfs/kmem.h b/fs/xfs/kmem.h index 3a7371cab508..64db0e53edea 100644 --- a/fs/xfs/kmem.h +++ b/fs/xfs/kmem.h @@ -32,6 +32,7 @@ typedef unsigned __bitwise xfs_km_flags_t; #define KM_NOSLEEP ((__force xfs_km_flags_t)0x0002u) #define KM_NOFS ((__force xfs_km_flags_t)0x0004u) #define KM_MAYFAIL ((__force xfs_km_flags_t)0x0008u) +#define KM_ZERO ((__force xfs_km_flags_t)0x0010u) /* * We use a special process flag to avoid recursive callbacks into @@ -43,7 +44,7 @@ kmem_flags_convert(xfs_km_flags_t flags) { gfp_t lflags; - BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL)); + BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_ZERO)); if (flags & KM_NOSLEEP) { lflags = GFP_ATOMIC | __GFP_NOWARN; @@ -52,11 +53,14 @@ kmem_flags_convert(xfs_km_flags_t flags) if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS)) lflags &= ~__GFP_FS; } + + if (flags & KM_ZERO) + lflags |= __GFP_ZERO; + return lflags; } extern void *kmem_alloc(size_t, xfs_km_flags_t); -extern void *kmem_zalloc(size_t, xfs_km_flags_t); extern void *kmem_zalloc_large(size_t size, xfs_km_flags_t); extern void *kmem_realloc(const void *, size_t, size_t, xfs_km_flags_t); extern void kmem_free(const void *); @@ -64,6 +68,12 @@ extern void kmem_free(const void *); extern void *kmem_zalloc_greedy(size_t *, size_t, size_t); +static inline void * +kmem_zalloc(size_t size, xfs_km_flags_t flags) +{ + return kmem_alloc(size, flags | KM_ZERO); +} + /* * Zone interfaces */ @@ -102,6 +112,11 @@ kmem_zone_destroy(kmem_zone_t *zone) } extern void *kmem_zone_alloc(kmem_zone_t *, xfs_km_flags_t); -extern void *kmem_zone_zalloc(kmem_zone_t *, xfs_km_flags_t); + +static inline void * +kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags) +{ + return kmem_zone_alloc(zone, flags | KM_ZERO); +} #endif /* __XFS_SUPPORT_KMEM_H__ */ |
