Anton Blanchard b4c112114a powerpc: Fix bad inline asm constraint in create_zero_mask() ... In create_zero_mask() we have: addi %1,%2,-1 andc %1,%1,%2 popcntd %0,%1 using the "r" constraint for %2. r0 is a valid register in the "r" set, but addi X,r0,X turns it into an li: li r7,-1 andc r7,r7,r0 popcntd r4,r7 Fix this by using the "b" constraint, for which r0 is not a valid register. This was found with a kernel build using gcc trunk, narrowed down to when -frename-registers was enabled at -O2. It is just luck however that we aren't seeing this on older toolchains. Thanks to Segher for working with me to find this issue. Cc: stable@vger.kernel.org Fixes: d0cebfa650 ("powerpc: word-at-a-time optimization for 64-bit Little Endian") Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2016-05-02 11:10:25 +10:00
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asm	powerpc: Fix bad inline asm constraint in create_zero_mask()	2016-05-02 11:10:25 +10:00
uapi/asm	powerpc: wire up preadv2 and pwritev2 syscalls	2016-04-27 16:47:55 +10:00