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authorGuo Ren <ren_guo@c-sky.com>2019-04-10 10:55:07 +0800
committerGuo Ren <ren_guo@c-sky.com>2019-04-22 13:44:57 +0800
commit981bbf274b64496fd4376b44120d47dae4ca94e8 (patch)
tree8a1832e851f7197e03d997b6dae632f04b06788b /arch/csky/abiv1/inc/abi
parentf62e31623d718a7c20d9da98de48361624d7360a (diff)
downloadlinux-sh-981bbf274b64496fd4376b44120d47dae4ca94e8.tar.gz
csky: Fixup wrong update_mmu_cache implementation
In our stress test, we found some crash problem caused by: if (!(vma->vm_flags & VM_EXEC)) return; in update_mmu_cache(). Seems current update_mmu_cache implementation is wrong and we retread to the conservative implementation. Also the usage of kmap_atomic in update_mmu_cache is risky, page-virtual may be scheduled out and changed, so we must use preempt_disable & pagefault_disable which is called by kmap_atomic(). Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/csky/abiv1/inc/abi')
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