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x86/percpu: Introduce size abstraction macros 

In preparation for cleaning up the percpu operations, define macros for
abstraction based on the width of the operation.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Dennis Zhou <dennis@kernel.org>
Link: https://lkml.kernel.org/r/20200720204925.3654302-2-ndesaulniers@google.com
This commit is contained in:
Brian Gerst 2020-07-20 13:49:15 -07:00 committed by Thomas Gleixner
parent ba47d845d7
commit 6865dc3ae9
1 changed files with 30 additions and 0 deletions
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30
arch/x86/include/asm/percpu.h
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@ -87,6 +87,36 @@
* don't give an lvalue though). */
extern void __bad_percpu_size(void);
#define __pcpu_type_1 u8
#define __pcpu_type_2 u16
#define __pcpu_type_4 u32
#define __pcpu_type_8 u64
#define __pcpu_cast_1(val) ((u8)(((unsigned long) val) & 0xff))
#define __pcpu_cast_2(val) ((u16)(((unsigned long) val) & 0xffff))
#define __pcpu_cast_4(val) ((u32)(((unsigned long) val) & 0xffffffff))
#define __pcpu_cast_8(val) ((u64)(val))
#define __pcpu_op1_1(op, dst) op "b " dst
#define __pcpu_op1_2(op, dst) op "w " dst
#define __pcpu_op1_4(op, dst) op "l " dst
#define __pcpu_op1_8(op, dst) op "q " dst
#define __pcpu_op2_1(op, src, dst) op "b " src ", " dst
#define __pcpu_op2_2(op, src, dst) op "w " src ", " dst
#define __pcpu_op2_4(op, src, dst) op "l " src ", " dst
#define __pcpu_op2_8(op, src, dst) op "q " src ", " dst
#define __pcpu_reg_1(mod, x) mod "q" (x)
#define __pcpu_reg_2(mod, x) mod "r" (x)
#define __pcpu_reg_4(mod, x) mod "r" (x)
#define __pcpu_reg_8(mod, x) mod "r" (x)
#define __pcpu_reg_imm_1(x) "qi" (x)
#define __pcpu_reg_imm_2(x) "ri" (x)
#define __pcpu_reg_imm_4(x) "ri" (x)
#define __pcpu_reg_imm_8(x) "re" (x)
#define percpu_to_op(qual, op, var, val) \
do { \
typedef typeof(var) pto_T__; \