Re: [PATCH 1/3] asm-generic/atomic64: Add support for ARCH_ATOMIC
From: Peter Zijlstra <peterz@infradead.org>
Date: 2020-11-11 13:45:06
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On Wed, Nov 11, 2020 at 02:39:01PM +0100, Christophe Leroy wrote:
Hello, Le 11/11/2020 à 12:07, Nicholas Piggin a écrit :quoted
This passes atomic64 selftest on ppc32 on qemu (uniprocessor only) both before and after powerpc is converted to use ARCH_ATOMIC.Can you explain what this change does and why it is needed ?
That certainly should've been in the Changelog. This enables atomic instrumentation, see asm-generic/atomic-instrumented.h. IOW, it makes atomic ops visible to K*SAN.