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| author | Hui Su <sh_def@163.com> | 2020-12-15 06:06:14 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-15 23:13:39 +0300 |
| commit | 30e6a51dbb0594d79dc2a9543659c1d596e2f7d4 (patch) | |
| tree | 184c00fd5c0654f9e4ebdb3fa989354755b20654 /include/linux/shmem_fs.h | |
| parent | 462680946b6d982afdda3bf5f7de3c379cb8c97b (diff) | |
| download | linux-30e6a51dbb0594d79dc2a9543659c1d596e2f7d4.tar.xz | |
mm/shmem.c: make shmem_mapping() inline
shmem_mapping() isn't worth an out-of-line call from any callsite.
So make it inline by
- make shmem_aops global
- export shmem_aops
- inline the shmem_mapping()
and replace the direct call 'shmem_aops' with shmem_mapping()
in shmem.c.
Link: https://lkml.kernel.org/r/20201115165207.GA265355@rlk
Signed-off-by: Hui Su <sh_def@163.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/shmem_fs.h')
| -rw-r--r-- | include/linux/shmem_fs.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h index a5a5d1d4d7b1..d82b6f396588 100644 --- a/include/linux/shmem_fs.h +++ b/include/linux/shmem_fs.h @@ -67,7 +67,11 @@ extern unsigned long shmem_get_unmapped_area(struct file *, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); extern int shmem_lock(struct file *file, int lock, struct user_struct *user); #ifdef CONFIG_SHMEM -extern bool shmem_mapping(struct address_space *mapping); +extern const struct address_space_operations shmem_aops; +static inline bool shmem_mapping(struct address_space *mapping) +{ + return mapping->a_ops == &shmem_aops; +} #else static inline bool shmem_mapping(struct address_space *mapping) { |