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Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull locking build fix from Thomas Gleixner:
 "A single fix for a build fail with CONFIG_PROFILE_ALL_BRANCHES=y in
  the qspinlock code"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/qspinlock: Fix compile error
This commit is contained in:
Linus Torvalds 2018-11-11 16:18:10 -06:00
commit 1acf93ca6c
1 changed files with 8 additions and 5 deletions
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13
arch/x86/include/asm/qspinlock.h
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@ -13,12 +13,15 @@
#define queued_fetch_set_pending_acquire queued_fetch_set_pending_acquire
static __always_inline u32 queued_fetch_set_pending_acquire(struct qspinlock *lock)
{
u32 val = 0;
if (GEN_BINARY_RMWcc(LOCK_PREFIX "btsl", lock->val.counter, c,
"I", _Q_PENDING_OFFSET))
val |= _Q_PENDING_VAL;
u32 val;
/*
* We can't use GEN_BINARY_RMWcc() inside an if() stmt because asm goto
* and CONFIG_PROFILE_ALL_BRANCHES=y results in a label inside a
* statement expression, which GCC doesn't like.
*/
val = GEN_BINARY_RMWcc(LOCK_PREFIX "btsl", lock->val.counter, c,
"I", _Q_PENDING_OFFSET) * _Q_PENDING_VAL;
val |= atomic_read(&lock->val) & ~_Q_PENDING_MASK;
return val;