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authorSteve Capper <steve.capper@linaro.org>2014-02-11 16:33:54 +0000
committerSteve Capper <steve.capper@linaro.org>2014-08-27 15:37:02 +0100
commit07e9c2c90b1a373d0bfef06bf1f6ddcf18317275 (patch)
treeddf623ad3145e00c2a9acdc8028ecef97cd87841 /arch/arm64/include/asm/pgtable.h
parent397b726089eb78cb8e9e138bce6ba8162cb9c40b (diff)
downloadlinux-07e9c2c90b1a373d0bfef06bf1f6ddcf18317275.tar.gz
arm64: mm: Enable HAVE_RCU_TABLE_FREE logic
In order to implement fast_get_user_pages we need to ensure that the page table walker is protected from page table pages being freed from under it. This patch enables HAVE_RCU_TABLE_FREE, any page table pages belonging to address spaces with multiple users will be call_rcu_sched freed. Meaning that disabling interrupts will block the free and protect the fast gup page walker. Signed-off-by: Steve Capper <steve.capper@linaro.org> Tested-by: Dann Frazier <dann.frazier@canonical.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
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