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Merge "mm: disable fault around on emulated access bit architecture"

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qctecmdr 2020-07-03 04:10:16 -07:00 • committed by Gerrit - the friendly Code Review server
commit b4e7c7ab9c
1 changed files with 8 additions and 0 deletions
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8
mm/memory.c
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@ -3605,8 +3605,16 @@ vm_fault_t finish_fault(struct vm_fault *vmf)
return ret;
}
/*
* If architecture emulates "accessed" or "young" bit without HW support,
* there is no much gain with fault_around.
*/
static unsigned long fault_around_bytes __read_mostly =
#ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
PAGE_SIZE;
#else
rounddown_pow_of_two(65536);
#endif
#ifdef CONFIG_DEBUG_FS
static int fault_around_bytes_get(void *data, u64 *val)