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powerpc/vdso32: fix CLOCK_MONOTONIC on PPC64 

Commit b5b4453e79 ("powerpc/vdso64: Fix CLOCK_MONOTONIC
inconsistencies across Y2038") changed the type of wtom_clock_sec
to s64 on PPC64. Therefore, VDSO32 needs to read it with a 4 bytes
shift in order to retrieve the lower part of it.

Fixes: b5b4453e79 ("powerpc/vdso64: Fix CLOCK_MONOTONIC inconsistencies across Y2038")
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-04-04 12:20:05 +00:00 committed by Michael Ellerman
parent fd427103e8
commit dd9a994fc6
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/vdso32/gettimeofday.S
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@ -98,7 +98,7 @@ V_FUNCTION_BEGIN(__kernel_clock_gettime)
* can be used, r7 contains NSEC_PER_SEC.
*/
lwz r5,WTOM_CLOCK_SEC(r9)
lwz r5,(WTOM_CLOCK_SEC+LOPART)(r9)
lwz r6,WTOM_CLOCK_NSEC(r9)
/* We now have our offset in r5,r6. We create a fake dependency