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| author | Will Deacon <will.deacon@arm.com> | 2019-02-22 13:37:21 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2019-04-08 12:00:28 +0100 |
| commit | 346e91ee090b07da8d15e36bc3169ddea6968713 (patch) | |
| tree | 8ec14892fbf565049c4ffa4a23d628514da4e991 /arch/mips/include/asm/Kbuild | |
| parent | e9e8543fecd2e1ca53616ba82fbd55a25cd2ab8a (diff) | |
| download | lwn-346e91ee090b07da8d15e36bc3169ddea6968713.tar.gz lwn-346e91ee090b07da8d15e36bc3169ddea6968713.zip | |
mips/mmiowb: Add unconditional mmiowb() to arch_spin_unlock()
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>
Diffstat (limited to 'arch/mips/include/asm/Kbuild')
| -rw-r--r-- | arch/mips/include/asm/Kbuild | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild index bf39c2253ec8..87b86cdf126a 100644 --- a/arch/mips/include/asm/Kbuild +++ b/arch/mips/include/asm/Kbuild @@ -12,7 +12,6 @@ generic-y += irq_work.h generic-y += local64.h generic-y += mcs_spinlock.h generic-y += mm-arch-hooks.h -generic-y += mmiowb.h generic-y += msi.h generic-y += parport.h generic-y += percpu.h |