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6aa7de0591
Please do not apply this to mainline directly, instead please re-run the
coccinelle script shown below and apply its output.
For several reasons, it is desirable to use {READ,WRITE}_ONCE() in
preference to ACCESS_ONCE(), and new code is expected to use one of the
former. So far, there's been no reason to change most existing uses of
ACCESS_ONCE(), as these aren't harmful, and changing them results in
churn.
However, for some features, the read/write distinction is critical to
correct operation. To distinguish these cases, separate read/write
accessors must be used. This patch migrates (most) remaining
ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following
coccinelle script:
----
// Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and
// WRITE_ONCE()
// $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch
virtual patch
@ depends on patch @
expression E1, E2;
@@
- ACCESS_ONCE(E1) = E2
+ WRITE_ONCE(E1, E2)
@ depends on patch @
expression E;
@@
- ACCESS_ONCE(E)
+ READ_ONCE(E)
----
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: davem@davemloft.net
Cc: linux-arch@vger.kernel.org
Cc: mpe@ellerman.id.au
Cc: shuah@kernel.org
Cc: snitzer@redhat.com
Cc: thor.thayer@linux.intel.com
Cc: tj@kernel.org
Cc: viro@zeniv.linux.org.uk
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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| .. | ||
| 6fire | ||
| bcd2000 | ||
| caiaq | ||
| hiface | ||
| line6 | ||
| misc | ||
| usx2y | ||
| card.c | ||
| card.h | ||
| clock.c | ||
| clock.h | ||
| debug.h | ||
| endpoint.c | ||
| endpoint.h | ||
| format.c | ||
| format.h | ||
| helper.c | ||
| helper.h | ||
| Kconfig | ||
| Makefile | ||
| midi.c | ||
| midi.h | ||
| mixer.c | ||
| mixer.h | ||
| mixer_maps.c | ||
| mixer_quirks.c | ||
| mixer_quirks.h | ||
| mixer_scarlett.c | ||
| mixer_scarlett.h | ||
| mixer_us16x08.c | ||
| mixer_us16x08.h | ||
| pcm.c | ||
| pcm.h | ||
| power.h | ||
| proc.c | ||
| proc.h | ||
| quirks-table.h | ||
| quirks.c | ||
| quirks.h | ||
| stream.c | ||
| stream.h | ||
| usbaudio.h | ||