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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2010-06-10 13:56:33 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-07-06 17:32:07 -0700 |
| commit | 140236b4b1c749c9b795ea3d11558a0eb5a3a080 (patch) | |
| tree | b720aa99ca2fc8bc012777c98d321b994c1730d7 /include | |
| parent | 47a716cf0ca981b9549ec9815122ada7a0ff707c (diff) | |
| download | blackbird-obmc-linux-140236b4b1c749c9b795ea3d11558a0eb5a3a080.tar.gz blackbird-obmc-linux-140236b4b1c749c9b795ea3d11558a0eb5a3a080.zip | |
VFS: introduce s_dirty accessors
This patch introduces 3 VFS accessors: 'sb_mark_dirty()',
'sb_mark_clean()', and 'sb_is_dirty()'. They simply
set 'sb->s_dirt' or test 'sb->s_dirt'. The plan is to make
every FS use these accessors later instead of manipulating
the 'sb->s_dirt' flag directly.
Ultimately, this change is a preparation for the periodic
superblock synchronization optimization which is about
preventing the "sync_supers" kernel thread from waking up
even if there is nothing to synchronize.
This patch does not do any functional change, just adds
accessor functions.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 471e1ff5079a..68ca1b0491af 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1783,6 +1783,19 @@ extern int get_sb_pseudo(struct file_system_type *, char *, struct vfsmount *mnt); extern void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb); +static inline void sb_mark_dirty(struct super_block *sb) +{ + sb->s_dirt = 1; +} +static inline void sb_mark_clean(struct super_block *sb) +{ + sb->s_dirt = 0; +} +static inline int sb_is_dirty(struct super_block *sb) +{ + return sb->s_dirt; +} + /* Alas, no aliases. Too much hassle with bringing module.h everywhere */ #define fops_get(fops) \ (((fops) && try_module_get((fops)->owner) ? (fops) : NULL)) |
