The patch titled
Subject: locking: fixup write_lock_nested() implementation
has been added to the -mm tree. Its filename is
locking-rwlocks-introduce-write_lock_nested-fix-2.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/locking-rwlocks-introduce-write_lock_nested-fix-2.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/locking-rwlocks-introduce-write_lock_nested-fix-2.patch
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------------------------------------------------------
From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Subject: locking: fixup write_lock_nested() implementation
kernel/locking/spinlock.c:306:9: error: implicit declaration of
function '__raw_write_lock_nested'; did you mean
Link: https://lkml.kernel.org/r/20211123170134.y6xb7pmpgdn4m3bn@xxxxxxxxxxxxx
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Waiman Long <longman@xxxxxxxxxx>
Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Mike Galbraith <umgwanakikbuti@xxxxxxxxx>
Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/rwlock_api_smp.h | 1 -
kernel/locking/spinlock.c | 4 ++++
2 files changed, 4 insertions(+), 1 deletion(-)
--- a/include/linux/rwlock_api_smp.h~locking-rwlocks-introduce-write_lock_nested-fix-2
+++ a/include/linux/rwlock_api_smp.h
@@ -47,7 +47,6 @@ _raw_write_unlock_irqrestore(rwlock_t *l
#ifdef CONFIG_INLINE_WRITE_LOCK
#define _raw_write_lock(lock) __raw_write_lock(lock)
-#define _raw_write_lock_nested(lock, subclass) __raw_write_lock_nested(lock, subclass)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_BH
--- a/kernel/locking/spinlock.c~locking-rwlocks-introduce-write_lock_nested-fix-2
+++ a/kernel/locking/spinlock.c
@@ -301,6 +301,10 @@ void __lockfunc _raw_write_lock(rwlock_t
}
EXPORT_SYMBOL(_raw_write_lock);
+#ifndef CONFIG_DEBUG_LOCK_ALLOC
+#define __raw_write_lock_nested(lock, subclass) __raw_write_lock(((void)(subclass), (lock)))
+#endif
+
void __lockfunc _raw_write_lock_nested(rwlock_t *lock, int subclass)
{
__raw_write_lock_nested(lock, subclass);
_
Patches currently in -mm which might be from bigeasy@xxxxxxxxxxxxx are
locking-rwlocks-introduce-write_lock_nested-fix-2.patch
