PWN-Hunter/android_kernel_xiaomi_sdm845
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locks: make posix_test_lock() interface more consistent

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Since posix_test_lock(), like fcntl() and ->lock(), indicates absence or
presence of a conflict lock by setting fl_type to, respectively, F_UNLCK
or something other than F_UNLCK, the return value is no longer needed.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
This commit is contained in:
J. Bruce Fields 2007-05-11 16:09:32 -04:00
parent 370f6599e8
commit 6d34ac199a
3 changed files with 8 additions and 8 deletions
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10
fs/locks.c
View File

@ -659,7 +659,7 @@ static int locks_block_on_timeout(struct file_lock *blocker, struct file_lock *w
return result; return result;
} }
int void
posix_test_lock(struct file *filp, struct file_lock *fl) posix_test_lock(struct file *filp, struct file_lock *fl)
{ {
struct file_lock *cfl; struct file_lock *cfl;
@ -671,14 +671,12 @@ posix_test_lock(struct file *filp, struct file_lock *fl)
if (posix_locks_conflict(cfl, fl)) if (posix_locks_conflict(cfl, fl))
break; break;
} }
if (cfl) { if (cfl)
__locks_copy_lock(fl, cfl); __locks_copy_lock(fl, cfl);
unlock_kernel(); else
return 1;
} else
fl->fl_type = F_UNLCK; fl->fl_type = F_UNLCK;
unlock_kernel(); unlock_kernel();
return 0; return;
} }
EXPORT_SYMBOL(posix_test_lock); EXPORT_SYMBOL(posix_test_lock);

4
fs/nfs/file.c
View File

@ -402,7 +402,9 @@ static int do_getlk(struct file *filp, int cmd, struct file_lock *fl)
lock_kernel(); lock_kernel();
/* Try local locking first */ /* Try local locking first */
if (posix_test_lock(filp, fl)) { posix_test_lock(filp, fl);
if (fl->fl_type != F_UNLCK) {
/* found a conflict */
goto out; goto out;
} }

2
include/linux/fs.h
View File

@ -862,7 +862,7 @@ extern void locks_init_lock(struct file_lock *);
extern void locks_copy_lock(struct file_lock *, struct file_lock *); extern void locks_copy_lock(struct file_lock *, struct file_lock *);
extern void locks_remove_posix(struct file *, fl_owner_t); extern void locks_remove_posix(struct file *, fl_owner_t);
extern void locks_remove_flock(struct file *); extern void locks_remove_flock(struct file *);
extern int posix_test_lock(struct file *, struct file_lock *); extern void posix_test_lock(struct file *, struct file_lock *);
extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *); extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *);
extern int posix_lock_file_wait(struct file *, struct file_lock *); extern int posix_lock_file_wait(struct file *, struct file_lock *);
extern int posix_unblock_lock(struct file *, struct file_lock *); extern int posix_unblock_lock(struct file *, struct file_lock *);