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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Merge branch 'parisc-3.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc build fix from Helge Deller:
"This unbreaks the kernel compilation on parisc with gcc-4.9"
* 'parisc-3.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: fix out-of-register compiler error in ldcw inline assembler function
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-3
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arch/parisc/include/asm/ldcw.h
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arch/parisc/include/asm/ldcw.h
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#endif /*!CONFIG_PA20*/
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-
/* LDCW, the only atomic read-write operation PA-RISC has. *sigh*. */
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/* LDCW, the only atomic read-write operation PA-RISC has. *sigh*.
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We don't explicitly expose that "*a" may be written as reload
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fails to find a register in class R1_REGS when "a" needs to be
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reloaded when generating 64-bit PIC code. Instead, we clobber
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memory to indicate to the compiler that the assembly code reads
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or writes to items other than those listed in the input and output
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operands. This may pessimize the code somewhat but __ldcw is
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usually used within code blocks surrounded by memory barriors. */
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#define __ldcw(a) ({ \
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unsigned __ret; \
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__asm__ __volatile__(__LDCW " 0(%2),%0" \
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: "=r" (__ret), "+m" (*(a)) : "r" (a)); \
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__asm__ __volatile__(__LDCW " 0(%1),%0" \
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: "=r" (__ret) : "r" (a) : "memory"); \
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__ret; \
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})
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