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Commit 5a2b59d3 authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Fix constraints on swab helpers. 



We are reading the memory location, so we have to have a memory
constraint in there purely for the sake of showing the data flow
to the compiler.

Reported-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1a17fdc4

arch/sparc/include/uapi/asm/swab.h

+6 −6
Original line number Diff line number Diff line
@@ -9,9 +9,9 @@ static inline __u16 __arch_swab16p(const __u16 *addr) 
{

	__u16 ret;



	__asm__ __volatile__ ("lduha [%1] %2, %0"

	__asm__ __volatile__ ("lduha [%2] %3, %0"

			      : "=r" (ret)

			      : "r" (addr), "i" (ASI_PL));

			      : "m" (*addr), "r" (addr), "i" (ASI_PL));

	return ret;

}

#define __arch_swab16p __arch_swab16p
@@ -20,9 +20,9 @@ static inline __u32 __arch_swab32p(const __u32 *addr) 
{

	__u32 ret;



	__asm__ __volatile__ ("lduwa [%1] %2, %0"

	__asm__ __volatile__ ("lduwa [%2] %3, %0"

			      : "=r" (ret)

			      : "r" (addr), "i" (ASI_PL));

			      : "m" (*addr), "r" (addr), "i" (ASI_PL));

	return ret;

}

#define __arch_swab32p __arch_swab32p
@@ -31,9 +31,9 @@ static inline __u64 __arch_swab64p(const __u64 *addr) 
{

	__u64 ret;



	__asm__ __volatile__ ("ldxa [%1] %2, %0"

	__asm__ __volatile__ ("ldxa [%2] %3, %0"

			      : "=r" (ret)

			      : "r" (addr), "i" (ASI_PL));

			      : "m" (*addr), "r" (addr), "i" (ASI_PL));

	return ret;

}

#define __arch_swab64p __arch_swab64p