The patch titled
Convert lockd to use the newer mutex instead of the older semaphore
has been removed from the -mm tree. Its filename is
knfsd-lockd-introduce-nsm_handle-sem2mutex.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: Convert lockd to use the newer mutex instead of the older semaphore
From: Neil Brown <neilb@xxxxxxx>
Both the (recently introduces) nsm_sema and the older f_sema are converted
over.
Cc: Olaf Kirch <okir@xxxxxxx>
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/lockd/host.c | 11 ++++++-----
fs/lockd/svclock.c | 22 +++++++++++-----------
fs/lockd/svcsubs.c | 2 +-
include/linux/lockd/lockd.h | 2 +-
4 files changed, 19 insertions(+), 18 deletions(-)
diff -puN fs/lockd/host.c~knfsd-lockd-introduce-nsm_handle-sem2mutex fs/lockd/host.c
--- a/fs/lockd/host.c~knfsd-lockd-introduce-nsm_handle-sem2mutex
+++ a/fs/lockd/host.c
@@ -436,7 +436,7 @@ nlm_gc_hosts(void)
* Manage NSM handles
*/
static LIST_HEAD(nsm_handles);
-static DECLARE_MUTEX(nsm_sema);
+static DEFINE_MUTEX(nsm_mutex);
static struct nsm_handle *
__nsm_find(const struct sockaddr_in *sin,
@@ -458,7 +458,7 @@ __nsm_find(const struct sockaddr_in *sin
return NULL;
}
- down(&nsm_sema);
+ mutex_lock(&nsm_mutex);
list_for_each(pos, &nsm_handles) {
nsm = list_entry(pos, struct nsm_handle, sm_link);
@@ -488,7 +488,8 @@ __nsm_find(const struct sockaddr_in *sin
list_add(&nsm->sm_link, &nsm_handles);
}
-out: up(&nsm_sema);
+out:
+ mutex_unlock(&nsm_mutex);
return nsm;
}
@@ -507,11 +508,11 @@ nsm_release(struct nsm_handle *nsm)
if (!nsm)
return;
if (atomic_dec_and_test(&nsm->sm_count)) {
- down(&nsm_sema);
+ mutex_lock(&nsm_mutex);
if (atomic_read(&nsm->sm_count) == 0) {
list_del(&nsm->sm_link);
kfree(nsm);
}
- up(&nsm_sema);
+ mutex_unlock(&nsm_mutex);
}
}
diff -puN fs/lockd/svclock.c~knfsd-lockd-introduce-nsm_handle-sem2mutex fs/lockd/svclock.c
--- a/fs/lockd/svclock.c~knfsd-lockd-introduce-nsm_handle-sem2mutex
+++ a/fs/lockd/svclock.c
@@ -254,9 +254,9 @@ static void nlmsvc_free_block(struct kre
dprintk("lockd: freeing block %p...\n", block);
/* Remove block from file's list of blocks */
- down(&file->f_sema);
+ mutex_lock(&file->f_mutex);
list_del_init(&block->b_flist);
- up(&file->f_sema);
+ mutex_unlock(&file->f_mutex);
nlmsvc_freegrantargs(block->b_call);
nlm_release_call(block->b_call);
@@ -281,7 +281,7 @@ void nlmsvc_traverse_blocks(struct nlm_h
struct nlm_block *block, *next;
restart:
- down(&file->f_sema);
+ mutex_lock(&file->f_mutex);
list_for_each_entry_safe(block, next, &file->f_blocks, b_flist) {
if (!match(block->b_host, host))
continue;
@@ -290,12 +290,12 @@ restart:
if (list_empty(&block->b_list))
continue;
kref_get(&block->b_count);
- up(&file->f_sema);
+ mutex_unlock(&file->f_mutex);
nlmsvc_unlink_block(block);
nlmsvc_release_block(block);
goto restart;
}
- up(&file->f_sema);
+ mutex_unlock(&file->f_mutex);
}
/*
@@ -354,7 +354,7 @@ nlmsvc_lock(struct svc_rqst *rqstp, stru
lock->fl.fl_flags &= ~FL_SLEEP;
again:
/* Lock file against concurrent access */
- down(&file->f_sema);
+ mutex_lock(&file->f_mutex);
/* Get existing block (in case client is busy-waiting) */
block = nlmsvc_lookup_block(file, lock);
if (block == NULL) {
@@ -392,10 +392,10 @@ again:
/* If we don't have a block, create and initialize it. Then
* retry because we may have slept in kmalloc. */
- /* We have to release f_sema as nlmsvc_create_block may try to
+ /* We have to release f_mutex as nlmsvc_create_block may try to
* to claim it while doing host garbage collection */
if (newblock == NULL) {
- up(&file->f_sema);
+ mutex_unlock(&file->f_mutex);
dprintk("lockd: blocking on this lock (allocating).\n");
if (!(newblock = nlmsvc_create_block(rqstp, file, lock, cookie)))
return nlm_lck_denied_nolocks;
@@ -405,7 +405,7 @@ again:
/* Append to list of blocked */
nlmsvc_insert_block(newblock, NLM_NEVER);
out:
- up(&file->f_sema);
+ mutex_unlock(&file->f_mutex);
nlmsvc_release_block(newblock);
nlmsvc_release_block(block);
dprintk("lockd: nlmsvc_lock returned %u\n", ret);
@@ -489,9 +489,9 @@ nlmsvc_cancel_blocked(struct nlm_file *f
(long long)lock->fl.fl_start,
(long long)lock->fl.fl_end);
- down(&file->f_sema);
+ mutex_lock(&file->f_mutex);
block = nlmsvc_lookup_block(file, lock);
- up(&file->f_sema);
+ mutex_unlock(&file->f_mutex);
if (block != NULL) {
status = nlmsvc_unlink_block(block);
nlmsvc_release_block(block);
diff -puN fs/lockd/svcsubs.c~knfsd-lockd-introduce-nsm_handle-sem2mutex fs/lockd/svcsubs.c
--- a/fs/lockd/svcsubs.c~knfsd-lockd-introduce-nsm_handle-sem2mutex
+++ a/fs/lockd/svcsubs.c
@@ -106,7 +106,7 @@ nlm_lookup_file(struct svc_rqst *rqstp,
goto out_unlock;
memcpy(&file->f_handle, f, sizeof(struct nfs_fh));
- init_MUTEX(&file->f_sema);
+ mutex_init(&file->f_mutex);
INIT_HLIST_NODE(&file->f_list);
INIT_LIST_HEAD(&file->f_blocks);
diff -puN include/linux/lockd/lockd.h~knfsd-lockd-introduce-nsm_handle-sem2mutex include/linux/lockd/lockd.h
--- a/include/linux/lockd/lockd.h~knfsd-lockd-introduce-nsm_handle-sem2mutex
+++ a/include/linux/lockd/lockd.h
@@ -111,7 +111,7 @@ struct nlm_file {
struct list_head f_blocks; /* blocked locks */
unsigned int f_locks; /* guesstimate # of locks */
unsigned int f_count; /* reference count */
- struct semaphore f_sema; /* avoid concurrent access */
+ struct mutex f_mutex; /* avoid concurrent access */
};
/*
_
Patches currently in -mm which might be from neilb@xxxxxxx are
origin.patch
vfs-destroy-the-dentries-contributed-by-a-superblock-on-unmounting.patch
knfsd-add-nfs-export-support-to-tmpfs.patch
knfsd-add-nfs-export-support-to-tmpfs-fixes.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
-
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