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a50e0e7076
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34247 3c298f89-4303-0410-b956-a3cf2f4a3e73
139 lines
4.4 KiB
Diff
139 lines
4.4 KiB
Diff
From c0c289363e84c53b5872f7c0c5069045096dca07 Mon Sep 17 00:00:00 2001
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From: Charles Manning <cdhmanning@gmail.com>
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Date: Wed, 3 Nov 2010 16:01:12 +1300
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Subject: [PATCH] yaffs: Switch from semaphores to mutexes
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commit 73c54aa8c1de3f61a4c211cd47431293a6092f18 upstream.
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Mutex is faster and init_MUTEX has been deprecated, so we'll just switch
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to mutexes.
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Signed-off-by: Charles Manning <cdhmanning@gmail.com>
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---
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yaffs_linux.h | 2 +-
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yaffs_vfs.c | 24 ++++++++++++------------
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yaffs_vfs_multi.c | 26 +++++++++++++-------------
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3 files changed, 26 insertions(+), 26 deletions(-)
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--- a/fs/yaffs2/yaffs_linux.h
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+++ b/fs/yaffs2/yaffs_linux.h
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@@ -25,7 +25,7 @@ struct yaffs_LinuxContext {
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struct super_block * superBlock;
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struct task_struct *bgThread; /* Background thread for this device */
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int bgRunning;
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- struct semaphore grossLock; /* Gross locking semaphore */
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+ struct mutex grossLock; /* Gross locking mutex*/
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__u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
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* at compile time so we have to allocate it.
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*/
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--- a/fs/yaffs2/yaffs_vfs_glue.c
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+++ b/fs/yaffs2/yaffs_vfs_glue.c
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@@ -515,14 +515,14 @@ static unsigned yaffs_gc_control_callbac
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static void yaffs_gross_lock(yaffs_dev_t *dev)
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{
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T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
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- down(&(yaffs_dev_to_lc(dev)->grossLock));
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+ mutex_lock(&(yaffs_dev_to_lc(dev)->grossLock));
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T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
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}
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static void yaffs_gross_unlock(yaffs_dev_t *dev)
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{
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T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
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- up(&(yaffs_dev_to_lc(dev)->grossLock));
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+ mutex_unlock(&(yaffs_dev_to_lc(dev)->grossLock));
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}
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#ifdef YAFFS_COMPILE_EXPORTFS
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@@ -2542,7 +2542,7 @@ static void yaffs_read_inode(struct inod
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#endif
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static YLIST_HEAD(yaffs_context_list);
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-struct semaphore yaffs_context_lock;
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+struct mutex yaffs_context_lock;
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static void yaffs_put_super(struct super_block *sb)
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{
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@@ -2568,9 +2568,9 @@ static void yaffs_put_super(struct super
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yaffs_gross_unlock(dev);
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- down(&yaffs_context_lock);
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+ mutex_lock(&yaffs_context_lock);
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ylist_del_init(&(yaffs_dev_to_lc(dev)->contextList));
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- up(&yaffs_context_lock);
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+ mutex_unlock(&yaffs_context_lock);
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if (yaffs_dev_to_lc(dev)->spareBuffer) {
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YFREE(yaffs_dev_to_lc(dev)->spareBuffer);
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@@ -3016,7 +3016,7 @@ static struct super_block *yaffs_interna
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param->skip_checkpt_rd = options.skip_checkpoint_read;
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param->skip_checkpt_wr = options.skip_checkpoint_write;
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- down(&yaffs_context_lock);
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+ mutex_lock(&yaffs_context_lock);
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/* Get a mount id */
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found = 0;
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for(mount_id=0; ! found; mount_id++){
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@@ -3030,13 +3030,13 @@ static struct super_block *yaffs_interna
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context->mount_id = mount_id;
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ylist_add_tail(&(yaffs_dev_to_lc(dev)->contextList), &yaffs_context_list);
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- up(&yaffs_context_lock);
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+ mutex_unlock(&yaffs_context_lock);
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/* Directory search handling...*/
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YINIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->searchContexts));
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param->remove_obj_fn = yaffs_remove_obj_callback;
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- init_MUTEX(&(yaffs_dev_to_lc(dev)->grossLock));
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+ mutex_init(&(yaffs_dev_to_lc(dev)->grossLock));
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yaffs_gross_lock(dev);
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@@ -3268,7 +3268,7 @@ static int yaffs_proc_read(char *page,
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else {
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step-=2;
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- down(&yaffs_context_lock);
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+ mutex_lock(&yaffs_context_lock);
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/* Locate and print the Nth entry. Order N-squared but N is small. */
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ylist_for_each(item, &yaffs_context_list) {
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@@ -3287,7 +3287,7 @@ static int yaffs_proc_read(char *page,
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break;
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}
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- up(&yaffs_context_lock);
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+ mutex_unlock(&yaffs_context_lock);
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}
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return buf - page < count ? buf - page : count;
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@@ -3301,7 +3301,7 @@ static int yaffs_stats_proc_read(char *p
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char *buf = page;
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int n = 0;
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- down(&yaffs_context_lock);
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+ mutex_lock(&yaffs_context_lock);
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/* Locate and print the Nth entry. Order N-squared but N is small. */
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ylist_for_each(item, &yaffs_context_list) {
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@@ -3317,7 +3317,7 @@ static int yaffs_stats_proc_read(char *p
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dev->bg_gcs, dev->oldest_dirty_gc_count,
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dev->n_obj, dev->n_tnodes);
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}
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- up(&yaffs_context_lock);
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+ mutex_unlock(&yaffs_context_lock);
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return buf - page < count ? buf - page : count;
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@@ -3494,7 +3494,7 @@ static int __init init_yaffs_fs(void)
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- init_MUTEX(&yaffs_context_lock);
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+ mutex_init(&yaffs_context_lock);
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/* Install the proc_fs entries */
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my_proc_entry = create_proc_entry("yaffs",
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