Merge remote-tracking branches 'asoc/fix/tlv320aic3x' and 'asoc/fix/wm8962' into...

[linux-drm-fsl-dcu.git] / arch / arm64 / kernel / entry-ftrace.S

diff --git a/arch/arm64/kernel/entry-ftrace.S b/arch/arm64/kernel/entry-ftrace.S
index 08cafc518b9a57ad724530b9dbb144d50683c13f..0f03a8fe23144e777b3ead0a6ea18e038b5d1066 100644 (file)
--- a/arch/arm64/kernel/entry-ftrace.S
+++ b/arch/arm64/kernel/entry-ftrace.S
@@ -178,6 +178,24 @@ ENTRY(ftrace_stub)
 ENDPROC(ftrace_stub)
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
+       /* save return value regs*/
+       .macro save_return_regs
+       sub sp, sp, #64
+       stp x0, x1, [sp]
+       stp x2, x3, [sp, #16]
+       stp x4, x5, [sp, #32]
+       stp x6, x7, [sp, #48]
+       .endm
+
+       /* restore return value regs*/
+       .macro restore_return_regs
+       ldp x0, x1, [sp]
+       ldp x2, x3, [sp, #16]
+       ldp x4, x5, [sp, #32]
+       ldp x6, x7, [sp, #48]
+       add sp, sp, #64
+       .endm
+
 /*
  * void ftrace_graph_caller(void)
  *
@@ -204,11 +222,11 @@ ENDPROC(ftrace_graph_caller)
  * only when CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST is enabled.
  */
 ENTRY(return_to_handler)
-       str     x0, [sp, #-16]!
+       save_return_regs
        mov     x0, x29                 //     parent's fp
        bl      ftrace_return_to_handler// addr = ftrace_return_to_hander(fp);
        mov     x30, x0                 // restore the original return address
-       ldr     x0, [sp], #16
+       restore_return_regs
        ret
 END(return_to_handler)
 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */