powerpc/64/sstep: Ifdef the deprecated fast endian switch syscall

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200225173541.1549955-25-npiggin@gmail.com

diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index c077acb..5f3a7bd 100644 (file)
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -3179,8 +3179,9 @@ int emulate_step(struct pt_regs *regs, unsigned int instr)
                 * entry code works.  If that is changed, this will
                 * need to be changed also.
                 */
-               if (regs->gpr[0] == 0x1ebe &&
-                   cpu_has_feature(CPU_FTR_REAL_LE)) {
+               if (IS_ENABLED(CONFIG_PPC_FAST_ENDIAN_SWITCH) &&
+                               cpu_has_feature(CPU_FTR_REAL_LE) &&
+                               regs->gpr[0] == 0x1ebe) {
                        regs->msr ^= MSR_LE;
                        goto instr_done;
                }