linux_dsm_epyc7002/arch/powerpc
Aneesh Kumar K.V 52c50ca75c powerpc/mm: handle protnone ptes on fork
We need to mark pages of parent process read only on fork.  Numa fault
pte needs a protnone ptes variant with saved write flag set.  On fork we
need to make sure we remove the saved write bit.  Instead of adding the
protnone check in the caller update ptep_set_wrprotect variants to clear
savedwrite bit.

Without this we see random segfaults in application on fork.

Fixes: c137a2757b ("powerpc/mm/autonuma: switch ppc64 to its own implementation of saved write")
Link: http://lkml.kernel.org/r/1488203787-17849-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-03-09 17:01:09 -08:00
..
boot powerpc updates for 4.11 part 2 2017-03-01 10:10:16 -08:00
configs powerpc updates for 4.11 part 2 2017-03-01 10:10:16 -08:00
crypto crypto: crc32c-vpmsum - Rename CRYPT_CRC32C_VPMSUM option 2016-11-28 21:23:17 +08:00
include powerpc/mm: handle protnone ptes on fork 2017-03-09 17:01:09 -08:00
kernel powerpc fixes for 4.11 #3 2017-03-07 10:46:10 -08:00
kvm Second batch of KVM changes for 4.11 merge window 2017-03-04 11:36:19 -08:00
lib powerpc fixes for 4.11 #3 2017-03-07 10:46:10 -08:00
math-emu Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mm powerpc fixes for 4.11 #3 2017-03-07 10:46:10 -08:00
net powerpc updates for 4.11 part 1. 2017-02-22 10:30:38 -08:00
oprofile ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
perf sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
platforms powerpc fixes for 4.11 #3 2017-03-07 10:46:10 -08:00
purgatory powerpc: Add purgatory for kexec_file_load() implementation. 2016-11-30 23:15:26 +11:00
scripts powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel 2016-03-07 14:53:56 +11:00
sysdev powerpc/xics: Work around limitations of OPAL XICS priority handling 2017-03-06 21:42:41 +11:00
xmon sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
Kconfig powerpc: Sort the selects under CONFIG_PPC 2017-03-06 23:05:42 +11:00
Kconfig.debug powerpc/xmon: Enable disassembly files (compilation changes) 2017-02-15 20:02:42 +11:00
Makefile powerpc: Fix compiling a BE kernel with a powerpc64le toolchain 2017-03-03 11:24:50 +11:00
relocs_check.sh powerpc/64: whitelist unresolved modversions CRCs 2016-09-22 14:46:31 +02:00