Merge tag 'powerpc-5.11-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - A fix for a change we made to __kernel_sigtramp_rt64() which confused
   glibc's backtrace logic, and also changed the semantics of that
   symbol, which was arguably an ABI break.

 - A fix for a stack overwrite in our VSX instruction emulation.

 - A couple of fixes for the Makefile logic in the new C VDSO.

Thanks to Masahiro Yamada, Naveen N.  Rao, Raoni Fassina Firmino, and
Ravi Bangoria.

* tag 'powerpc-5.11-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64/signal: Fix regression in __kernel_sigtramp_rt64() semantics
  powerpc/vdso64: remove meaningless vgettimeofday.o build rule
  powerpc/vdso: fix unnecessary rebuilds of vgettimeofday.o
  powerpc/sstep: Fix array out of bound warning

1 files changed, 8 insertions, 6 deletions

diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index bf7a7d62ae8b..ede093e96234 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -818,13 +818,15 @@ void emulate_vsx_store(struct instruction_op *op, const union vsx_reg *reg,
 			break;
 		if (rev) {
 			/* reverse 32 bytes */
-			buf.d[0] = byterev_8(reg->d[3]);
-			buf.d[1] = byterev_8(reg->d[2]);
-			buf.d[2] = byterev_8(reg->d[1]);
-			buf.d[3] = byterev_8(reg->d[0]);
-			reg = &buf;
+			union vsx_reg buf32[2];
+			buf32[0].d[0] = byterev_8(reg[1].d[1]);
+			buf32[0].d[1] = byterev_8(reg[1].d[0]);
+			buf32[1].d[0] = byterev_8(reg[0].d[1]);
+			buf32[1].d[1] = byterev_8(reg[0].d[0]);
+			memcpy(mem, buf32, size);
+		} else {
+			memcpy(mem, reg, size);
 		}
-		memcpy(mem, reg, size);
 		break;
 	case 16:
 		/* stxv, stxvx, stxvl, stxvll */