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authorJeff Layton <jlayton@primarydata.com>2014-08-22 10:18:44 -0400
committerJeff Layton <jlayton@primarydata.com>2014-09-09 16:01:09 -0400
commit699688a416524c3cea9eafaca69fc6c06c13c02e (patch)
tree3ece46a475ab54135bbcd01d97a563c52a1f2eaa /fs/locks.c
parent09802fd2a8caea2a2147fca8d7975697c5de573d (diff)
downloadlinux-699688a416524c3cea9eafaca69fc6c06c13c02e.tar.bz2
locks: remove lock_may_read and lock_may_write
There are no callers of these functions. Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Diffstat (limited to 'fs/locks.c')
-rw-r--r--fs/locks.c80
1 files changed, 0 insertions, 80 deletions
diff --git a/fs/locks.c b/fs/locks.c
index c3991dc80137..5200ffd2ba9b 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -2597,86 +2597,6 @@ static int __init proc_locks_init(void)
module_init(proc_locks_init);
#endif
-/**
- * lock_may_read - checks that the region is free of locks
- * @inode: the inode that is being read
- * @start: the first byte to read
- * @len: the number of bytes to read
- *
- * Emulates Windows locking requirements. Whole-file
- * mandatory locks (share modes) can prohibit a read and
- * byte-range POSIX locks can prohibit a read if they overlap.
- *
- * N.B. this function is only ever called
- * from knfsd and ownership of locks is never checked.
- */
-int lock_may_read(struct inode *inode, loff_t start, unsigned long len)
-{
- struct file_lock *fl;
- int result = 1;
-
- spin_lock(&inode->i_lock);
- for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
- if (IS_POSIX(fl)) {
- if (fl->fl_type == F_RDLCK)
- continue;
- if ((fl->fl_end < start) || (fl->fl_start > (start + len)))
- continue;
- } else if (IS_FLOCK(fl)) {
- if (!(fl->fl_type & LOCK_MAND))
- continue;
- if (fl->fl_type & LOCK_READ)
- continue;
- } else
- continue;
- result = 0;
- break;
- }
- spin_unlock(&inode->i_lock);
- return result;
-}
-
-EXPORT_SYMBOL(lock_may_read);
-
-/**
- * lock_may_write - checks that the region is free of locks
- * @inode: the inode that is being written
- * @start: the first byte to write
- * @len: the number of bytes to write
- *
- * Emulates Windows locking requirements. Whole-file
- * mandatory locks (share modes) can prohibit a write and
- * byte-range POSIX locks can prohibit a write if they overlap.
- *
- * N.B. this function is only ever called
- * from knfsd and ownership of locks is never checked.
- */
-int lock_may_write(struct inode *inode, loff_t start, unsigned long len)
-{
- struct file_lock *fl;
- int result = 1;
-
- spin_lock(&inode->i_lock);
- for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
- if (IS_POSIX(fl)) {
- if ((fl->fl_end < start) || (fl->fl_start > (start + len)))
- continue;
- } else if (IS_FLOCK(fl)) {
- if (!(fl->fl_type & LOCK_MAND))
- continue;
- if (fl->fl_type & LOCK_WRITE)
- continue;
- } else
- continue;
- result = 0;
- break;
- }
- spin_unlock(&inode->i_lock);
- return result;
-}
-
-EXPORT_SYMBOL(lock_may_write);
-
static int __init filelock_init(void)
{
int i;