Basically the existing percpu ops can be used. However, we do not pass a reference to a percpu variable in. Instead an address of a percpu variable is provided. Both preempt, the non preempt and the irqsafe operations generate the same code. Signed-off-by: Christoph Lameter --- arch/x86/include/asm/percpu.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) Index: linux-2.6/arch/x86/include/asm/percpu.h =================================================================== --- linux-2.6.orig/arch/x86/include/asm/percpu.h 2009-06-04 13:38:01.000000000 -0500 +++ linux-2.6/arch/x86/include/asm/percpu.h 2009-06-04 14:21:22.000000000 -0500 @@ -140,6 +140,28 @@ do { \ #define percpu_or(var, val) percpu_to_op("or", per_cpu__##var, val) #define percpu_xor(var, val) percpu_to_op("xor", per_cpu__##var, val) +#define __this_cpu_read(pcp) percpu_from_op("mov", pcp) +#define __this_cpu_write(pcp, val) percpu_to_op("mov", (pcp), val) +#define __this_cpu_add(pcp, val) percpu_to_op("add", (pcp), val) +#define __this_cpu_sub(pcp, val) percpu_to_op("sub", (pcp), val) +#define __this_cpu_and(pcp, val) percpu_to_op("and", (pcp), val) +#define __this_cpu_or(pcp, val) percpu_to_op("or", (pcp), val) +#define __this_cpu_xor(pcp, val) percpu_to_op("xor", (pcp), val) + +#define this_cpu_read(pcp) percpu_from_op("mov", (pcp)) +#define this_cpu_write(pcp, val) percpu_to_op("mov", (pcp), val) +#define this_cpu_add(pcp, val) percpu_to_op("add", (pcp), val) +#define this_cpu_sub(pcp, val) percpu_to_op("sub", (pcp), val) +#define this_cpu_and(pcp, val) percpu_to_op("and", (pcp), val) +#define this_cpu_or(pcp, val) percpu_to_op("or", (pcp), val) +#define this_cpu_xor(pcp, val) percpu_to_op("xor", (pcp), val) + +#define irqsafe_cpu_add(pcp, val) percpu_to_op("add", (pcp), val) +#define irqsafe_cpu_sub(pcp, val) percpu_to_op("sub", (pcp), val) +#define irqsafe_cpu_and(pcp, val) percpu_to_op("and", (pcp), val) +#define irqsafe_cpu_or(pcp, val) percpu_to_op("or", (pcp), val) +#define irqsafe_cpu_xor(pcp, val) percpu_to_op("xor", (pcp), val) + /* This is not atomic against other CPUs -- CPU preemption needs to be off */ #define x86_test_and_clear_bit_percpu(bit, var) \ ({ \ -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/