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Subject[PATCH] ARM: Add unwinding annotations to __loop.*delay functions
Date
The unwind directives can't handle nested function entries, so only the
outermost function __loop_udelay is annotated, and the inner nested
entries share the same unwind info with __loop_udelay.

Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
---
arch/arm/lib/delay-loop.S | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm/lib/delay-loop.S b/arch/arm/lib/delay-loop.S
index 3ccade0f8130..f0a076f9abc5 100644
--- a/arch/arm/lib/delay-loop.S
+++ b/arch/arm/lib/delay-loop.S
@@ -7,6 +7,7 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/delay.h>
+#include <asm/unwind.h>

.text

@@ -21,6 +22,7 @@
*/

ENTRY(__loop_udelay)
+UNWIND(.fnstart)
ldr r2, .LC1
mul r0, r2, r0 @ r0 = delay_us * UDELAY_MULT
ENTRY(__loop_const_udelay) @ 0 <= r0 <= 0xfffffaf0
@@ -54,6 +56,7 @@ ENTRY(__loop_delay)
#endif
bhi __loop_delay
ret lr
-ENDPROC(__loop_udelay)
-ENDPROC(__loop_const_udelay)
ENDPROC(__loop_delay)
+ENDPROC(__loop_const_udelay)
+UNWIND(.fnend)
+ENDPROC(__loop_udelay)
--
2.27.0
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