Commit a0e10291 authored by Christophe Leroy's avatar Christophe Leroy Committed by Michael Ellerman
Browse files

powerpc/io: remove old GCC version implementation 



GCC 4.6 is the minimum supported now.

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 23ad1a27

arch/powerpc/include/asm/io.h

+0 −20
Original line number Diff line number Diff line
@@ -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)	\

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