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authorThomas Gleixner <tglx@linutronix.de>2008-02-23 15:23:55 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-23 17:12:15 -0800
commit3e4ab747efa8e78562ec6782b08bbf21a00aba1b (patch)
tree755b76c9f382a808c718a0289193602038b14c9b /kernel
parent43fe105a5c91b2f00ea7f900ed307fe980410612 (diff)
downloadop-kernel-dev-3e4ab747efa8e78562ec6782b08bbf21a00aba1b.zip
op-kernel-dev-3e4ab747efa8e78562ec6782b08bbf21a00aba1b.tar.gz
futex: fix init order
When the futex init code fails to initialize the futex pseudo file system it returns early without initializing the hash queues. Should the boot succeed then a futex syscall which tries to enqueue a waiter on the hashqueue will crash due to the unitilialized plist heads. Initialize the hash queues before the filesystem. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Lennert Buytenhek <buytenh@wantstofly.org> Cc: Riku Voipio <riku.voipio@movial.fi> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/futex.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/kernel/futex.c b/kernel/futex.c
index 221f212..c21f667 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -2145,8 +2145,14 @@ static struct file_system_type futex_fs_type = {
static int __init init(void)
{
- int i = register_filesystem(&futex_fs_type);
+ int i;
+ for (i = 0; i < ARRAY_SIZE(futex_queues); i++) {
+ plist_head_init(&futex_queues[i].chain, &futex_queues[i].lock);
+ spin_lock_init(&futex_queues[i].lock);
+ }
+
+ i = register_filesystem(&futex_fs_type);
if (i)
return i;
@@ -2156,10 +2162,6 @@ static int __init init(void)
return PTR_ERR(futex_mnt);
}
- for (i = 0; i < ARRAY_SIZE(futex_queues); i++) {
- plist_head_init(&futex_queues[i].chain, &futex_queues[i].lock);
- spin_lock_init(&futex_queues[i].lock);
- }
return 0;
}
__initcall(init);
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