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| author | Brian Gerst <brgerst@gmail.com> | 2009-01-21 17:26:05 +0900 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2009-01-21 17:26:05 +0900 |
| commit | 299e26992a737804e13e74fdb97cdab470ed19ac (patch) | |
| tree | 65796f4ef75b1915509225bf9a1c2f3cde48ba0a | |
| parent | 06deef892c7327992434917fb6592c233430803d (diff) | |
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: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | arch/x86/include/asm/percpu.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h index ce980db5e59..0b64af4f13a 100644 --- a/arch/x86/include/asm/percpu.h +++ b/arch/x86/include/asm/percpu.h @@ -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(); \ } \ |