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Linux 3.12 compat: split shrinker has s_shrink

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The split count/scan shrinker callbacks introduced in 3.12 broke the
test for HAVE_SHRINK, effectively disabling the per-superblock shrinkers.

This patch re-enables the per-superblock shrinkers when the split shrinker
callbacks have been detected.

Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2975
This commit is contained in:
Tim Chase
2014-12-18 10:08:47 -06:00
committed by Brian Behlendorf
parent 6e9710f7c3
commit 3c832b8cc1
2 changed files with 10 additions and 6 deletions
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module/zfs/zfs_vfsops.c
+6 -2
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@@ -1068,7 +1068,7 @@ zfs_root(zfs_sb_t *zsb, struct inode **ipp)
}
EXPORT_SYMBOL(zfs_root);
#ifdef HAVE_SHRINK
#if defined(HAVE_SHRINK) || defined(HAVE_SPLIT_SHRINKER_CALLBACK)
int
zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
{
@@ -1080,13 +1080,17 @@ zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
};
ZFS_ENTER(zsb);
#ifdef HAVE_SPLIT_SHRINKER_CALLBACK
*objects = (*shrinker->scan_objects)(shrinker, &sc);
#else
*objects = (*shrinker->shrink)(shrinker, &sc);
#endif
ZFS_EXIT(zsb);
return (0);
}
EXPORT_SYMBOL(zfs_sb_prune);
#endif /* HAVE_SHRINK */
#endif /* defined(HAVE_SHRINK) || defined(HAVE_SPLIT_SHRINKER_CALLBACK) */
/*
* Teardown the zfs_sb_t.