powerpc/vdso32: fix CLOCK_MONOTONIC on PPC64

Commit b5b4453e7912 ("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: b5b4453e7912 ("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>

diff --git a/arch/powerpc/kernel/vdso32/gettimeofday.S b/arch/powerpc/kernel/vdso32/gettimeofday.S
index 1e0bc5955a400601b106949f14c7a0ca64d1a6a6..afd516b572f8637447315ec882c08189bcf2fb4d 100644 (file)
--- a/arch/powerpc/kernel/vdso32/gettimeofday.S
+++ b/arch/powerpc/kernel/vdso32/gettimeofday.S
@@ -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