mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-22 18:41:06 +00:00
346e91ee09
The mmiowb() macro is horribly difficult to use and drivers will continue to work most of the time if they omit a call when it is required. Rather than rely on driver authors getting this right, push mmiowb() into arch_spin_unlock() for mips. If this is deemed to be a performance issue, a subsequent optimisation could make use of ARCH_HAS_MMIOWB to elide the barrier in cases where no I/O writes were performed inside the critical section. Acked-by: Paul Burton <paul.burton@mips.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
11 lines
197 B
C
11 lines
197 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_MMIOWB_H
|
|
#define _ASM_MMIOWB_H
|
|
|
|
#include <asm/io.h>
|
|
|
|
#define mmiowb() iobarrier_w()
|
|
|
|
#include <asm-generic/mmiowb.h>
|
|
|
|
#endif /* _ASM_MMIOWB_H */
|