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Commit 299e2699 authored by Brian Gerst's avatar Brian Gerst Committed by Tejun Heo
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x86: fix percpu_write with 64-bit constants 



Impact: slightly better code generation for percpu_to_op()

The processor will sign-extend 32-bit immediate values in 64-bit
operations.  Use the 'e' constraint ("32-bit signed integer constant,
or a symbolic reference known to fit that range") for 64-bit constants.

Signed-off-by: default avatarBrian Gerst <brgerst@gmail.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 06deef89

arch/x86/include/asm/percpu.h

+1 −1
Original line number Diff line number Diff line
@@ -75,7 +75,7 @@ do { \ 
	case 8:						\

		asm(op "q %1,"__percpu_arg(0)		\

		    : "+m" (var)			\

		    : "r" ((T__)val));			\

		    : "re" ((T__)val));			\

		break;					\

	default: __bad_percpu_size();			\

	}						\