Will Deacon d1be6a28b1 asm-generic/mmiowb: Add generic implementation of mmiowb() tracking ...

In preparation for removing all explicit mmiowb() calls from driver
code, implement a tracking system in asm-generic based loosely on the
PowerPC implementation. This allows architectures with a non-empty
mmiowb() definition to have the barrier automatically inserted in
spin_unlock() following a critical section containing an I/O write.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

2019-04-08 11:59:39 +01:00

9.6 KiB

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