[PATCH 4.0 47/55] s390/kdump: fix REGSET_VX_LOW vector register ELF notes

[Greg Kroah-Hartman]

4.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx>

commit 3c8e5105e759e7b2d88ea8a85b1285e535bc7500 upstream.

The REGSET_VX_LOW ELF notes should contain the lower 64 bit halfes of the
first sixteen 128 bit vector registers. Unfortunately currently we copy
the upper halfes.

Fix this and correctly copy the lower halfes.

Fixes: a62bc0739253 ("s390/kdump: add support for vector extension")
Signed-off-by: Michael Holzheu <holzheu@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/s390/kernel/crash_dump.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -415,7 +415,7 @@ static void *nt_s390_vx_low(void *ptr, _
 	ptr += len;
 	/* Copy lower halves of SIMD registers 0-15 */
 	for (i = 0; i < 16; i++) {
-		memcpy(ptr, &vx_regs[i], 8);
+		memcpy(ptr, &vx_regs[i].u[2], 8);
 		ptr += 8;
 	}
 	return ptr;


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