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authorCatalin Marinas <catalin.marinas@arm.com>2010-09-13 16:58:37 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-09-19 13:17:45 +0200
commit85848dd7ab75fce1134856228582a8df522c91d9 (patch)
tree3b5f34bf871e983d30fad787c098e6d778d962bd /lib/vsprintf.c
parentARM: 6380/1: Introduce __sync_icache_dcache() for VIPT caches (diff)
downloadlinux-85848dd7ab75fce1134856228582a8df522c91d9.tar.xz
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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>
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