avoid need for -march=mips2 to compile mips atomic.h asm

linux guarantees ll/sc are always available. on mips1, they will be
emulated by the kernel. thus they are part of the linux mips1 abi and
safe to use.

diff --git a/arch/mips/atomic.h b/arch/mips/atomic.h
index a09f98d..f3478ef 100644 (file)
--- a/arch/mips/atomic.h
+++ b/arch/mips/atomic.h
@@ -27,6 +27,7 @@ static inline int a_cas(volatile int *p, int t, int s)
        int dummy;
        __asm__ __volatile__(
                ".set push\n"
+               ".set mips2\n"
                ".set noreorder\n"
                "1:     ll %0, 0(%2)\n"
                "       bne %0, %3, 1f\n"
@@ -56,6 +57,7 @@ static inline int a_swap(volatile int *x, int v)
        int old, dummy;
        __asm__ __volatile__(
                ".set push\n"
+               ".set mips2\n"
                ".set noreorder\n"
                "1:     ll %0, 0(%2)\n"
                "       addu %1, %3, $0\n"
@@ -73,6 +75,7 @@ static inline int a_fetch_add(volatile int *x, int v)
        int old, dummy;
        __asm__ __volatile__(
                ".set push\n"
+               ".set mips2\n"
                ".set noreorder\n"
                "1:     ll %0, 0(%2)\n"
                "       addu %1, %0, %3\n"
@@ -90,6 +93,7 @@ static inline void a_inc(volatile int *x)
        int dummy;
        __asm__ __volatile__(
                ".set push\n"
+               ".set mips2\n"
                ".set noreorder\n"
                "1:     ll %0, 0(%1)\n"
                "       addu %0, %0, 1\n"
@@ -106,6 +110,7 @@ static inline void a_dec(volatile int *x)
        int dummy;
        __asm__ __volatile__(
                ".set push\n"
+               ".set mips2\n"
                ".set noreorder\n"
                "1:     ll %0, 0(%1)\n"
                "       subu %0, %0, 1\n"
@@ -122,6 +127,7 @@ static inline void a_store(volatile int *p, int x)
        int dummy;
        __asm__ __volatile__(
                ".set push\n"
+               ".set mips2\n"
                ".set noreorder\n"
                "1:     ll %0, 0(%1)\n"
                "       addu %0, %2, $0\n"
@@ -147,6 +153,7 @@ static inline void a_and(volatile int *p, int v)
        int dummy;
        __asm__ __volatile__(
                ".set push\n"
+               ".set mips2\n"
                ".set noreorder\n"
                "1:     ll %0, 0(%1)\n"
                "       and %0, %0, %2\n"
@@ -163,6 +170,7 @@ static inline void a_or(volatile int *p, int v)
        int dummy;
        __asm__ __volatile__(
                ".set push\n"
+               ".set mips2\n"
                ".set noreorder\n"
                "1:     ll %0, 0(%1)\n"
                "       or %0, %0, %2\n"