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Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  futexes: Remove rw parameter from get_futex_key()
This commit is contained in:
Linus Torvalds 2010-01-16 12:31:30 -08:00
commit 2a8249daf6
1 changed files with 12 additions and 15 deletions
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27
kernel/futex.c
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@ -203,8 +203,6 @@ static void drop_futex_key_refs(union futex_key *key)
* @uaddr: virtual address of the futex
* @fshared: 0 for a PROCESS_PRIVATE futex, 1 for PROCESS_SHARED
* @key: address where result is stored.
* @rw: mapping needs to be read/write (values: VERIFY_READ,
* VERIFY_WRITE)
*
* Returns a negative error code or 0
* The key words are stored in *key on success.
@ -216,7 +214,7 @@ static void drop_futex_key_refs(union futex_key *key)
* lock_page() might sleep, the caller should not hold a spinlock.
*/
static int
get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw)
get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key)
{
unsigned long address = (unsigned long)uaddr;
struct mm_struct *mm = current->mm;
@ -239,7 +237,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw)
* but access_ok() should be faster than find_vma()
*/
if (!fshared) {
if (unlikely(!access_ok(rw, uaddr, sizeof(u32))))
if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))))
return -EFAULT;
key->private.mm = mm;
key->private.address = address;
@ -248,7 +246,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw)
}
again:
err = get_user_pages_fast(address, 1, rw == VERIFY_WRITE, &page);
err = get_user_pages_fast(address, 1, 1, &page);
if (err < 0)
return err;
@ -867,7 +865,7 @@ static int futex_wake(u32 __user *uaddr, int fshared, int nr_wake, u32 bitset)
if (!bitset)
return -EINVAL;
ret = get_futex_key(uaddr, fshared, &key, VERIFY_READ);
ret = get_futex_key(uaddr, fshared, &key);
if (unlikely(ret != 0))
goto out;
@ -913,10 +911,10 @@ futex_wake_op(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
int ret, op_ret;
retry:
ret = get_futex_key(uaddr1, fshared, &key1, VERIFY_READ);
ret = get_futex_key(uaddr1, fshared, &key1);
if (unlikely(ret != 0))
goto out;
ret = get_futex_key(uaddr2, fshared, &key2, VERIFY_WRITE);
ret = get_futex_key(uaddr2, fshared, &key2);
if (unlikely(ret != 0))
goto out_put_key1;
@ -1175,11 +1173,10 @@ static int futex_requeue(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
pi_state = NULL;
}
ret = get_futex_key(uaddr1, fshared, &key1, VERIFY_READ);
ret = get_futex_key(uaddr1, fshared, &key1);
if (unlikely(ret != 0))
goto out;
ret = get_futex_key(uaddr2, fshared, &key2,
requeue_pi ? VERIFY_WRITE : VERIFY_READ);
ret = get_futex_key(uaddr2, fshared, &key2);
if (unlikely(ret != 0))
goto out_put_key1;
@ -1738,7 +1735,7 @@ static int futex_wait_setup(u32 __user *uaddr, u32 val, int fshared,
*/
retry:
q->key = FUTEX_KEY_INIT;
ret = get_futex_key(uaddr, fshared, &q->key, VERIFY_READ);
ret = get_futex_key(uaddr, fshared, &q->key);
if (unlikely(ret != 0))
return ret;
@ -1904,7 +1901,7 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
q.requeue_pi_key = NULL;
retry:
q.key = FUTEX_KEY_INIT;
ret = get_futex_key(uaddr, fshared, &q.key, VERIFY_WRITE);
ret = get_futex_key(uaddr, fshared, &q.key);
if (unlikely(ret != 0))
goto out;
@ -2023,7 +2020,7 @@ static int futex_unlock_pi(u32 __user *uaddr, int fshared)
if ((uval & FUTEX_TID_MASK) != task_pid_vnr(current))
return -EPERM;
ret = get_futex_key(uaddr, fshared, &key, VERIFY_WRITE);
ret = get_futex_key(uaddr, fshared, &key);
if (unlikely(ret != 0))
goto out;
@ -2215,7 +2212,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared,
rt_waiter.task = NULL;
key2 = FUTEX_KEY_INIT;
ret = get_futex_key(uaddr2, fshared, &key2, VERIFY_WRITE);
ret = get_futex_key(uaddr2, fshared, &key2);
if (unlikely(ret != 0))
goto out;