diff options
| author | Waiman Long <longman@redhat.com> | 2021-02-10 21:16:31 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-11 15:59:54 +0300 |
| commit | d8d0da4eee5c4e86ea08abde6975848376b4ac13 (patch) | |
| tree | df7d562b9d39161d947da8ddd68f07f0cfda43d7 /kernel/locking | |
| parent | 9294b8a12585f8b4ccb9c060b54bab0bd13f24b9 (diff) | |
| download | linux-d8d0da4eee5c4e86ea08abde6975848376b4ac13.tar.xz | |
locking/arch: Move qrwlock.h include after qspinlock.h
include/asm-generic/qrwlock.h was trying to get arch_spin_is_locked via
asm-generic/qspinlock.h. However, this does not work because architectures
might be using queued rwlocks but not queued spinlocks (csky), or because they
might be defining their own queued_* macros before including asm/qspinlock.h.
To fix this, ensure that asm/spinlock.h always includes qrwlock.h after
defining arch_spin_is_locked (either directly for csky, or via
asm/qspinlock.h for other architectures). The only inclusion elsewhere
is in kernel/locking/qrwlock.c. That one is really unnecessary because
the file is only compiled in SMP configurations (config QUEUED_RWLOCKS
depends on SMP) and in that case linux/spinlock.h already includes
asm/qrwlock.h if needed, via asm/spinlock.h.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Waiman Long <longman@redhat.com>
Fixes: 26128cb6c7e6 ("locking/rwlocks: Add contention detection for rwlocks")
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Ben Gardon <bgardon@google.com>
[Add arch/sparc and kernel/locking parts per discussion with Waiman. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/qrwlock.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/locking/qrwlock.c b/kernel/locking/qrwlock.c index fe9ca92faa2a..4786dd271b45 100644 --- a/kernel/locking/qrwlock.c +++ b/kernel/locking/qrwlock.c @@ -12,7 +12,6 @@ #include <linux/percpu.h> #include <linux/hardirq.h> #include <linux/spinlock.h> -#include <asm/qrwlock.h> /** * queued_read_lock_slowpath - acquire read lock of a queue rwlock |