fs: rename buffer trylock

Like the page lock change, this also requires name change, so convert the
raw test_and_set bitop to a trylock.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 files changed, 17 insertions, 13 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index 4dbe52948e8f..38653e36e225 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1720,7 +1720,7 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
                  */
                 if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
                         lock_buffer(bh);
-                } else if (test_set_buffer_locked(bh)) {
+                } else if (!trylock_buffer(bh)) {
                         redirty_page_for_writepage(wbc, page);
                         continue;
                 }
@@ -3000,7 +3000,7 @@ void ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
 
                 if (rw == SWRITE || rw == SWRITE_SYNC)
                         lock_buffer(bh);
-                else if (test_set_buffer_locked(bh))
+                else if (!trylock_buffer(bh))
                         continue;
 
                 if (rw == WRITE || rw == SWRITE || rw == SWRITE_SYNC) {
diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c
index 81a9ad7177ca..ae08c057e751 100644
--- a/fs/jbd/commit.c
+++ b/fs/jbd/commit.c
@@ -221,7 +221,7 @@ write_out_data:
                  * blocking lock_buffer().
                  */
                 if (buffer_dirty(bh)) {
-                        if (test_set_buffer_locked(bh)) {
+                        if (!trylock_buffer(bh)) {
                                 BUFFER_TRACE(bh, "needs blocking lock");
                                 spin_unlock(&journal->j_list_lock);
                                 /* Write out all data to prevent deadlocks */
diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c
index 00e9ccde8e42..b38f944f0667 100644
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -1194,7 +1194,7 @@ lock_retry_remap:
                 tbh = bhs[i];
                 if (!tbh)
                         continue;
-                if (unlikely(test_set_buffer_locked(tbh)))
+                if (!trylock_buffer(tbh))
                         BUG();
                 /* The buffer dirty state is now irrelevant, just clean it. */
                 clear_buffer_dirty(tbh);
diff --git a/fs/ntfs/compress.c b/fs/ntfs/compress.c
index 33ff314cc507..9669541d0119 100644
--- a/fs/ntfs/compress.c
+++ b/fs/ntfs/compress.c
@@ -665,7 +665,7 @@ lock_retry_remap:
         for (i = 0; i < nr_bhs; i++) {
                 struct buffer_head *tbh = bhs[i];
 
-                if (unlikely(test_set_buffer_locked(tbh)))
+                if (!trylock_buffer(tbh))
                         continue;
                 if (unlikely(buffer_uptodate(tbh))) {
                         unlock_buffer(tbh);
diff --git a/fs/ntfs/mft.c b/fs/ntfs/mft.c
index 790defb847e7..17d32ca6bc35 100644
--- a/fs/ntfs/mft.c
+++ b/fs/ntfs/mft.c
@@ -586,7 +586,7 @@ int ntfs_sync_mft_mirror(ntfs_volume *vol, const unsigned long mft_no,
                 for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
                         struct buffer_head *tbh = bhs[i_bhs];
 
-                        if (unlikely(test_set_buffer_locked(tbh)))
+                        if (!trylock_buffer(tbh))
                                 BUG();
                         BUG_ON(!buffer_uptodate(tbh));
                         clear_buffer_dirty(tbh);
@@ -779,7 +779,7 @@ int write_mft_record_nolock(ntfs_inode *ni, MFT_RECORD *m, int sync)
         for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
                 struct buffer_head *tbh = bhs[i_bhs];
 
-                if (unlikely(test_set_buffer_locked(tbh)))
+                if (!trylock_buffer(tbh))
                         BUG();
                 BUG_ON(!buffer_uptodate(tbh));
                 clear_buffer_dirty(tbh);
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 192269698a8a..5699171212ae 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2435,7 +2435,7 @@ static int reiserfs_write_full_page(struct page *page,
                 if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
                         lock_buffer(bh);
                 } else {
-                        if (test_set_buffer_locked(bh)) {
+                        if (!trylock_buffer(bh)) {
                                 redirty_page_for_writepage(wbc, page);
                                 continue;
                         }
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index ce2208b27118..c21df71943a6 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -855,7 +855,7 @@ static int write_ordered_buffers(spinlock_t * lock,
                 jh = JH_ENTRY(list->next);
                 bh = jh->bh;
                 get_bh(bh);
-                if (test_set_buffer_locked(bh)) {
+                if (!trylock_buffer(bh)) {
                         if (!buffer_dirty(bh)) {
                                 list_move(&jh->list, &tmp);
                                 goto loop_next;
@@ -3871,7 +3871,7 @@ int reiserfs_prepare_for_journal(struct super_block *p_s_sb,
 {
         PROC_INFO_INC(p_s_sb, journal.prepare);
 
-        if (test_set_buffer_locked(bh)) {
+        if (!trylock_buffer(bh)) {
                 if (!wait)
                         return 0;
                 lock_buffer(bh);
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index fa73179233ad..fa47e43b8b41 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1104,7 +1104,7 @@ xfs_page_state_convert(
                          * that we are writing into for the first time.
                          */
                         type = IOMAP_NEW;
-                        if (!test_and_set_bit(BH_Lock, &bh->b_state)) {
+                        if (trylock_buffer(bh)) {
                                 ASSERT(buffer_mapped(bh));
                                 if (iomap_valid)
                                         all_bh = 1;
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 50cfe8ceb478..eadaab44015f 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -115,7 +115,6 @@ BUFFER_FNS(Uptodate, uptodate)
 BUFFER_FNS(Dirty, dirty)
 TAS_BUFFER_FNS(Dirty, dirty)
 BUFFER_FNS(Lock, locked)
-TAS_BUFFER_FNS(Lock, locked)
 BUFFER_FNS(Req, req)
 TAS_BUFFER_FNS(Req, req)
 BUFFER_FNS(Mapped, mapped)
@@ -321,10 +320,15 @@ static inline void wait_on_buffer(struct buffer_head *bh)
                 __wait_on_buffer(bh);
 }
 
+static inline int trylock_buffer(struct buffer_head *bh)
+{
+        return likely(!test_and_set_bit(BH_Lock, &bh->b_state));
+}
+
 static inline void lock_buffer(struct buffer_head *bh)
 {
         might_sleep();
-        if (test_set_buffer_locked(bh))
+        if (!trylock_buffer(bh))
                 __lock_buffer(bh);
 }