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locking/refcount: Consolidate implementations of refcount_t

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The generic implementation of refcount_t should be good enough for
everybody, so remove ARCH_HAS_REFCOUNT and REFCOUNT_FULL entirely,
leaving the generic implementation enabled unconditionally.

Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Elena Reshetova <elena.reshetova@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191121115902.2551-9-will@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Will Deacon
2019-11-21 11:59:00 +00:00
committed by Ingo Molnar
parent 65b0085524
commit fb041bb7c0
11 changed files with 59 additions and 308 deletions
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2
lib/refcount.c
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@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Out-of-line refcount functions common to all refcount implementations.
* Out-of-line refcount functions.
*/
#include <linux/mutex.h>