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-rw-r--r--fs/stack.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/stack.c b/fs/stack.c
index a54e33ed10f1..664ed35558bd 100644
--- a/fs/stack.c
+++ b/fs/stack.c
@@ -21,11 +21,10 @@ void fsstack_copy_inode_size(struct inode *dst, struct inode *src)
21 i_size = i_size_read(src); 21 i_size = i_size_read(src);
22 22
23 /* 23 /*
24 * But if CONFIG_LBDAF (on 32-bit), we ought to make an effort to 24 * But on 32-bit, we ought to make an effort to keep the two halves of
25 * keep the two halves of i_blocks in sync despite SMP or PREEMPT - 25 * i_blocks in sync despite SMP or PREEMPT - though stat's
26 * though stat's generic_fillattr() doesn't bother, and we won't be 26 * generic_fillattr() doesn't bother, and we won't be applying quotas
27 * applying quotas (where i_blocks does become important) at the 27 * (where i_blocks does become important) at the upper level.
28 * upper level.
29 * 28 *
30 * We don't actually know what locking is used at the lower level; 29 * We don't actually know what locking is used at the lower level;
31 * but if it's a filesystem that supports quotas, it will be using 30 * but if it's a filesystem that supports quotas, it will be using
@@ -44,9 +43,9 @@ void fsstack_copy_inode_size(struct inode *dst, struct inode *src)
44 * include/linux/fs.h). We don't necessarily hold i_mutex when this 43 * include/linux/fs.h). We don't necessarily hold i_mutex when this
45 * is called, so take i_lock for that case. 44 * is called, so take i_lock for that case.
46 * 45 *
47 * And if CONFIG_LBDAF (on 32-bit), continue our effort to keep the 46 * And if on 32-bit, continue our effort to keep the two halves of
48 * two halves of i_blocks in sync despite SMP or PREEMPT: use i_lock 47 * i_blocks in sync despite SMP or PREEMPT: use i_lock for that case
49 * for that case too, and do both at once by combining the tests. 48 * too, and do both at once by combining the tests.
50 * 49 *
51 * There is none of this locking overhead in the 64-bit case. 50 * There is none of this locking overhead in the 64-bit case.
52 */ 51 */