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powerpc/io: remove old GCC version implementation 

GCC 4.6 is the minimum supported now.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-10-16 12:33:40 +00:00 committed by Michael Ellerman
parent 23ad1a2700
commit a0e102914a
1 changed files with 0 additions and 20 deletions
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20
arch/powerpc/include/asm/io.h
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@ -111,25 +111,6 @@ extern bool isa_io_special;
#define IO_SET_SYNC_FLAG()
#endif
/* gcc 4.0 and older doesn't have 'Z' constraint */
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ == 0)
#define DEF_MMIO_IN_X(name, size, insn) \
static inline u##size name(const volatile u##size __iomem *addr) \
{ \
u##size ret; \
__asm__ __volatile__("sync;"#insn" %0,0,%1;twi 0,%0,0;isync" \
: "=r" (ret) : "r" (addr), "m" (*addr) : "memory"); \
return ret; \
}
#define DEF_MMIO_OUT_X(name, size, insn) \
static inline void name(volatile u##size __iomem *addr, u##size val) \
{ \
__asm__ __volatile__("sync;"#insn" %1,0,%2" \
: "=m" (*addr) : "r" (val), "r" (addr) : "memory"); \
IO_SET_SYNC_FLAG(); \
}
#else /* newer gcc */
#define DEF_MMIO_IN_X(name, size, insn) \
static inline u##size name(const volatile u##size __iomem *addr) \
{ \
@ -146,7 +127,6 @@ static inline void name(volatile u##size __iomem *addr, u##size val) \
: "=Z" (*addr) : "r" (val) : "memory"); \
IO_SET_SYNC_FLAG(); \
}
#endif
#define DEF_MMIO_IN_D(name, size, insn) \
static inline u##size name(const volatile u##size __iomem *addr) \