kernel/include/asm-generic/mmiowb.h, branch linux-5.2.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-5.2.y2019-04-08T10:59:39Zasm-generic/mmiowb: Add generic implementation of mmiowb() tracking2019-04-08T10:59:39ZWill Deaconwill.deacon@arm.com2019-02-22T12:48:44Zurn:sha1:d1be6a28b13ce6d1bc42bf9b6a9454c65839225b
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>