deal with 'set-but-unused-variables' in a more generic way

SVN-Revision: 31123

target/linux/generic/patches-2.6.37/970-mips-gcc-4.6-set-but-unused-fixes.patch

@@ -1,44 +1,12 @@
---- a/arch/mips/kernel/signal.c
-+++ b/arch/mips/kernel/signal.c
-@@ -84,7 +84,7 @@ static int protected_save_fp_context(str
- 
- static int protected_restore_fp_context(struct sigcontext __user *sc)
- {
--	int err, tmp;
-+	int err, tmp  __maybe_unused;
- 	while (1) {
- 		lock_fpu_owner();
- 		own_fpu_inatomic(0);
---- a/arch/mips/kernel/syscall.c
-+++ b/arch/mips/kernel/syscall.c
-@@ -383,7 +383,7 @@ save_static_function(sys_sysmips);
- static int __used noinline
- _sys_sysmips(nabi_no_regargs struct pt_regs regs)
- {
--	long cmd, arg1, arg2, arg3;
-+	long cmd, arg1, arg2, arg3 __maybe_unused;
- 
- 	cmd = regs.regs[4];
- 	arg1 = regs.regs[5];
---- a/arch/mips/mm/init.c
-+++ b/arch/mips/mm/init.c
-@@ -324,7 +324,7 @@ int page_is_ram(unsigned long pagenr)
- void __init paging_init(void)
- {
- 	unsigned long max_zone_pfns[MAX_NR_ZONES];
--	unsigned long lastpfn;
-+	unsigned long lastpfn __maybe_unused;
- 
- 	pagetable_init();
- 
---- a/arch/mips/mm/c-r4k.c
-+++ b/arch/mips/mm/c-r4k.c
-@@ -1075,7 +1075,7 @@ static int __cpuinit probe_scache(void)
- 	unsigned long flags, addr, begin, end, pow2;
- 	unsigned int config = read_c0_config();
- 	struct cpuinfo_mips *c = &current_cpu_data;
--	int tmp;
-+	int tmp __maybe_unused;
- 
- 	if (config & CONF_SC)
- 		return 0;
+--- linux-2.6.37.6.org/Makefile	2012-03-28 17:10:58.297558774 +0200
++++ linux-2.6.37.6.mod/Makefile	2012-03-28 17:15:00.161564521 +0200
+@@ -354,7 +354,8 @@
+ 		   -fno-strict-aliasing -fno-common \
+ 		   -Werror-implicit-function-declaration \
+ 		   -Wno-format-security \
+-		   -fno-delete-null-pointer-checks
++		   -fno-delete-null-pointer-checks \
++		   -Wno-error=unused-but-set-variable
+ KBUILD_AFLAGS_KERNEL :=
+ KBUILD_CFLAGS_KERNEL :=
+ KBUILD_AFLAGS   := -D__ASSEMBLY__