1 files changed, 17 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c
index b2702e87db0d..5fa92706444b 100644
--- a/arch/powerpc/kernel/syscalls.c
+++ b/arch/powerpc/kernel/syscalls.c
@@ -121,3 +121,20 @@ long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,
                              (u64)len_high << 32 | len_low, advice);
 }
+
+long sys_switch_endian(void)
+{
+        struct thread_info *ti;
+
+        current->thread.regs->msr ^= MSR_LE;
+
+        /*
+         * Set TIF_RESTOREALL so that r3 isn't clobbered on return to
+         * userspace. That also has the effect of restoring the non-volatile
+         * GPRs, so we saved them on the way in here.
+         */
+        ti = current_thread_info();
+        ti->flags |= _TIF_RESTOREALL;
+
+        return 0;
+}