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| author | Waiman Long <longman@redhat.com> | 2024-02-22 10:05:37 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-02-28 13:08:37 +0100 |
| commit | ca4bc2e07b716509fd279d2b449bb42f4263a9c8 (patch) | |
| tree | 63123ffe5039b9a0800bd965ba040a9e0775dafc /kernel/locking | |
| parent | 6dfee110c6cc7a6c3c1f45a07428c15820b87c1d (diff) | |
| download | linux-ca4bc2e07b716509fd279d2b449bb42f4263a9c8.tar.gz linux-ca4bc2e07b716509fd279d2b449bb42f4263a9c8.tar.bz2 linux-ca4bc2e07b716509fd279d2b449bb42f4263a9c8.zip | |
locking/qspinlock: Fix 'wait_early' set but not used warning
When CONFIG_LOCK_EVENT_COUNTS is off, the wait_early variable will be
set but not used. This is expected. Recent compilers will not generate
wait_early code in this case.
Add the __maybe_unused attribute to wait_early for suppressing this
W=1 warning.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20240222150540.79981-2-longman@redhat.com
Closes: https://lore.kernel.org/oe-kbuild-all/202312260422.f4pK3f9m-lkp@intel.com/
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/qspinlock_paravirt.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/locking/qspinlock_paravirt.h b/kernel/locking/qspinlock_paravirt.h index 6a0184e9c234..ae2b12f68b90 100644 --- a/kernel/locking/qspinlock_paravirt.h +++ b/kernel/locking/qspinlock_paravirt.h @@ -294,8 +294,8 @@ static void pv_wait_node(struct mcs_spinlock *node, struct mcs_spinlock *prev) { struct pv_node *pn = (struct pv_node *)node; struct pv_node *pp = (struct pv_node *)prev; + bool __maybe_unused wait_early; int loop; - bool wait_early; for (;;) { for (wait_early = false, loop = SPIN_THRESHOLD; loop; loop--) { |