powerpc: remove STACK_FRAME_OVERHEAD

This is equal to STACK_FRAME_MIN_SIZE on 32-bit and 64-bit ELFv1, and no
longer used in 64-bit ELFv2, so replace STACK_FRAME_OVERHEAD occurrences
with STACK_FRAME_MIN_SIZE.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221127124942.1665522-18-npiggin@gmail.com

arch/powerpc/include/asm/ptrace.h

@@ -118,7 +118,6 @@ struct pt_regs
 #define USER_REDZONE_SIZE	512
 #define KERNEL_REDZONE_SIZE	288
 
-#define STACK_FRAME_OVERHEAD	112	/* size of minimum stack frame */
 #define STACK_FRAME_LR_SAVE	2	/* Location of LR in stack frame */
 
 #ifdef CONFIG_PPC64_ELF_ABI_V2
@@ -135,11 +134,11 @@ struct pt_regs
  * so the second from last one of those is used for the frame marker.
  */
 #define STACK_FRAME_MIN_SIZE	112
-#define STACK_USER_INT_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define STACK_INT_FRAME_REGS	STACK_FRAME_OVERHEAD
-#define STACK_INT_FRAME_MARKER	(STACK_FRAME_OVERHEAD - 16)
-#define STACK_SWITCH_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define STACK_SWITCH_FRAME_REGS	STACK_FRAME_OVERHEAD
+#define STACK_USER_INT_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_MIN_SIZE)
+#define STACK_INT_FRAME_REGS	STACK_FRAME_MIN_SIZE
+#define STACK_INT_FRAME_MARKER	(STACK_FRAME_MIN_SIZE - 16)
+#define STACK_SWITCH_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_MIN_SIZE)
+#define STACK_SWITCH_FRAME_REGS	STACK_FRAME_MIN_SIZE
 #endif
 
 /* Size of dummy stack frame allocated when calling signal handler. */
@@ -150,14 +149,13 @@ struct pt_regs
 
 #define USER_REDZONE_SIZE	0
 #define KERNEL_REDZONE_SIZE	0
-#define STACK_FRAME_OVERHEAD	16	/* size of minimum stack frame */
+#define STACK_FRAME_MIN_SIZE	16
 #define STACK_FRAME_LR_SAVE	1	/* Location of LR in stack frame */
-#define STACK_USER_INT_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define STACK_INT_FRAME_REGS	STACK_FRAME_OVERHEAD
-#define STACK_INT_FRAME_MARKER	(STACK_FRAME_OVERHEAD - 8)
-#define STACK_FRAME_MIN_SIZE	STACK_FRAME_OVERHEAD
-#define STACK_SWITCH_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define STACK_SWITCH_FRAME_REGS	STACK_FRAME_OVERHEAD
+#define STACK_USER_INT_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_MIN_SIZE)
+#define STACK_INT_FRAME_REGS	STACK_FRAME_MIN_SIZE
+#define STACK_INT_FRAME_MARKER	(STACK_FRAME_MIN_SIZE - 8)
+#define STACK_SWITCH_FRAME_SIZE	(sizeof(struct pt_regs) + STACK_FRAME_MIN_SIZE)
+#define STACK_SWITCH_FRAME_REGS	STACK_FRAME_MIN_SIZE
 
 /* Size of stack frame allocated when calling signal handler. */
 #define __SIGNAL_FRAMESIZE	64