mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
139 lines
4.4 KiB
Diff
139 lines
4.4 KiB
Diff
From c0c289363e84c53b5872f7c0c5069045096dca07 Mon Sep 17 00:00:00 2001
|
|
From: Charles Manning <cdhmanning@gmail.com>
|
|
Date: Wed, 3 Nov 2010 16:01:12 +1300
|
|
Subject: [PATCH] yaffs: Switch from semaphores to mutexes
|
|
|
|
commit 73c54aa8c1de3f61a4c211cd47431293a6092f18 upstream.
|
|
|
|
Mutex is faster and init_MUTEX has been deprecated, so we'll just switch
|
|
to mutexes.
|
|
|
|
Signed-off-by: Charles Manning <cdhmanning@gmail.com>
|
|
---
|
|
yaffs_linux.h | 2 +-
|
|
yaffs_vfs.c | 24 ++++++++++++------------
|
|
yaffs_vfs_multi.c | 26 +++++++++++++-------------
|
|
3 files changed, 26 insertions(+), 26 deletions(-)
|
|
|
|
--- a/fs/yaffs2/yaffs_linux.h
|
|
+++ b/fs/yaffs2/yaffs_linux.h
|
|
@@ -25,7 +25,7 @@ struct yaffs_LinuxContext {
|
|
struct super_block * superBlock;
|
|
struct task_struct *bgThread; /* Background thread for this device */
|
|
int bgRunning;
|
|
- struct semaphore grossLock; /* Gross locking semaphore */
|
|
+ struct mutex grossLock; /* Gross locking mutex*/
|
|
__u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer
|
|
* at compile time so we have to allocate it.
|
|
*/
|
|
--- a/fs/yaffs2/yaffs_vfs_glue.c
|
|
+++ b/fs/yaffs2/yaffs_vfs_glue.c
|
|
@@ -515,14 +515,14 @@ static unsigned yaffs_gc_control_callbac
|
|
static void yaffs_gross_lock(yaffs_dev_t *dev)
|
|
{
|
|
T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
|
|
- down(&(yaffs_dev_to_lc(dev)->grossLock));
|
|
+ mutex_lock(&(yaffs_dev_to_lc(dev)->grossLock));
|
|
T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
|
|
}
|
|
|
|
static void yaffs_gross_unlock(yaffs_dev_t *dev)
|
|
{
|
|
T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
|
|
- up(&(yaffs_dev_to_lc(dev)->grossLock));
|
|
+ mutex_unlock(&(yaffs_dev_to_lc(dev)->grossLock));
|
|
}
|
|
|
|
#ifdef YAFFS_COMPILE_EXPORTFS
|
|
@@ -2542,7 +2542,7 @@ static void yaffs_read_inode(struct inod
|
|
#endif
|
|
|
|
static YLIST_HEAD(yaffs_context_list);
|
|
-struct semaphore yaffs_context_lock;
|
|
+struct mutex yaffs_context_lock;
|
|
|
|
static void yaffs_put_super(struct super_block *sb)
|
|
{
|
|
@@ -2568,9 +2568,9 @@ static void yaffs_put_super(struct super
|
|
|
|
yaffs_gross_unlock(dev);
|
|
|
|
- down(&yaffs_context_lock);
|
|
+ mutex_lock(&yaffs_context_lock);
|
|
ylist_del_init(&(yaffs_dev_to_lc(dev)->contextList));
|
|
- up(&yaffs_context_lock);
|
|
+ mutex_unlock(&yaffs_context_lock);
|
|
|
|
if (yaffs_dev_to_lc(dev)->spareBuffer) {
|
|
YFREE(yaffs_dev_to_lc(dev)->spareBuffer);
|
|
@@ -3016,7 +3016,7 @@ static struct super_block *yaffs_interna
|
|
param->skip_checkpt_rd = options.skip_checkpoint_read;
|
|
param->skip_checkpt_wr = options.skip_checkpoint_write;
|
|
|
|
- down(&yaffs_context_lock);
|
|
+ mutex_lock(&yaffs_context_lock);
|
|
/* Get a mount id */
|
|
found = 0;
|
|
for(mount_id=0; ! found; mount_id++){
|
|
@@ -3030,13 +3030,13 @@ static struct super_block *yaffs_interna
|
|
context->mount_id = mount_id;
|
|
|
|
ylist_add_tail(&(yaffs_dev_to_lc(dev)->contextList), &yaffs_context_list);
|
|
- up(&yaffs_context_lock);
|
|
+ mutex_unlock(&yaffs_context_lock);
|
|
|
|
/* Directory search handling...*/
|
|
YINIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->searchContexts));
|
|
param->remove_obj_fn = yaffs_remove_obj_callback;
|
|
|
|
- init_MUTEX(&(yaffs_dev_to_lc(dev)->grossLock));
|
|
+ mutex_init(&(yaffs_dev_to_lc(dev)->grossLock));
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
@@ -3268,7 +3268,7 @@ static int yaffs_proc_read(char *page,
|
|
else {
|
|
step-=2;
|
|
|
|
- down(&yaffs_context_lock);
|
|
+ mutex_lock(&yaffs_context_lock);
|
|
|
|
/* Locate and print the Nth entry. Order N-squared but N is small. */
|
|
ylist_for_each(item, &yaffs_context_list) {
|
|
@@ -3287,7 +3287,7 @@ static int yaffs_proc_read(char *page,
|
|
|
|
break;
|
|
}
|
|
- up(&yaffs_context_lock);
|
|
+ mutex_unlock(&yaffs_context_lock);
|
|
}
|
|
|
|
return buf - page < count ? buf - page : count;
|
|
@@ -3301,7 +3301,7 @@ static int yaffs_stats_proc_read(char *p
|
|
char *buf = page;
|
|
int n = 0;
|
|
|
|
- down(&yaffs_context_lock);
|
|
+ mutex_lock(&yaffs_context_lock);
|
|
|
|
/* Locate and print the Nth entry. Order N-squared but N is small. */
|
|
ylist_for_each(item, &yaffs_context_list) {
|
|
@@ -3317,7 +3317,7 @@ static int yaffs_stats_proc_read(char *p
|
|
dev->bg_gcs, dev->oldest_dirty_gc_count,
|
|
dev->n_obj, dev->n_tnodes);
|
|
}
|
|
- up(&yaffs_context_lock);
|
|
+ mutex_unlock(&yaffs_context_lock);
|
|
|
|
|
|
return buf - page < count ? buf - page : count;
|
|
@@ -3494,7 +3494,7 @@ static int __init init_yaffs_fs(void)
|
|
|
|
|
|
|
|
- init_MUTEX(&yaffs_context_lock);
|
|
+ mutex_init(&yaffs_context_lock);
|
|
|
|
/* Install the proc_fs entries */
|
|
my_proc_entry = create_proc_entry("yaffs",
|