tree 3b5f34bf871e983d30fad787c098e6d778d962bd
parent 6012191aa9c6ffff3a23b81162298318b56d7cb3
author Catalin Marinas <catalin.marinas@arm.com> 1284389917 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1284895065 +0100

ARM: 6381/1: Use lazy cache flushing on ARMv7 SMP systems

ARMv7 processors like Cortex-A9 broadcast the cache maintenance
operations in hardware. This patch allows the
flush_dcache_page/update_mmu_cache pair to work in lazy flushing mode
similar to the UP case.

Note that cache flushing on SMP systems now takes place via the
set_pte_at() call (__sync_icache_dcache) and there is no race with other
CPUs executing code from the new PTE before the cache flushing took
place.

Tested-by: Rabin Vincent <rabin.vincent@stericsson.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>