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VFS/fsstack: handle 32-bit smp + preempt + large files in fsstack_copy_inode_size

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Copy the inode size and blocks from one inode to another correctly on 32-bit
systems with CONFIG_SMP, CONFIG_PREEMPT, or CONFIG_LBDAF.  Use proper inode
spinlocks only when i_size/i_blocks cannot fit in one 32-bit word.

Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Erez Zadok 2009-12-03 21:56:09 -05:00 • committed by Al Viro
parent 9afa2fb6c1
commit 1b8ab8159e
2 changed files with 52 additions and 4 deletions
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2
include/linux/fs_stack.h
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@ -9,7 +9,7 @@
/* externs for fs/stack.c */
extern void fsstack_copy_attr_all(struct inode *dest, const struct inode *src);
extern void fsstack_copy_inode_size(struct inode *dst, const struct inode *src);
extern void fsstack_copy_inode_size(struct inode *dst, struct inode *src);
/* inlines */
static inline void fsstack_copy_attr_atime(struct inode *dest,