powerpc: Put the gpr save/restore functions in their own section
authorStephen Rothwell <sfr@canb.auug.org.au>
Thu, 5 Jul 2012 21:09:40 +0000 (21:09 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 11 Jul 2012 04:19:59 +0000 (14:19 +1000)
This allows the linker to know that calls to them do not need to switch
TOC and stop errors like the following when linking large configurations:

powerpc64-linux-ld: drivers/built-in.o: In function `.gpiochip_is_requested':
(.text+0x4): sibling call optimization to `_savegpr0_29' does not allow automatic multiple TOCs; recompile with -mminimal-toc or -fno-optimize-sibling-calls, or make `_savegpr0_29' extern

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/lib/crtsavres.S

index 1c893f0..b2c68ce 100644 (file)
 #include <asm/ppc_asm.h>
 
        .file   "crtsavres.S"
-       .section ".text"
 
 #ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 
 #ifndef CONFIG_PPC64
 
+       .section ".text"
+
 /* Routines for saving integer registers, called by the compiler.  */
 /* Called with r11 pointing to the stack header word of the caller of the */
 /* function, just beyond the end of the integer save area.  */
@@ -232,6 +233,8 @@ _GLOBAL(_rest32gpr_31_x)
 
 #else /* CONFIG_PPC64 */
 
+       .section ".text.save.restore","ax",@progbits
+
 .globl _savegpr0_14
 _savegpr0_14:
        std     r14,-144(r1)