1 #ifndef __ARCH_S390_PERCPU__
2 #define __ARCH_S390_PERCPU__
4 #include <linux/compiler.h>
5 #include <asm/lowcore.h>
8 * s390 uses its own implementation for per cpu data, the offset of
9 * the cpu local data area is cached in the cpu's lowcore memory.
10 * For 64 bit module code s390 forces the use of a GOT slot for the
11 * address of the per cpu variable. This is needed because the module
12 * may be more than 4G above the per cpu area.
14 #if defined(__s390x__) && defined(MODULE)
16 #define SHIFT_PERCPU_PTR(ptr,offset) (({ \
17 extern int simple_identifier_##var(void); \
18 unsigned long *__ptr; \
19 asm ( "larl %0, %1@GOTENT" \
20 : "=a" (__ptr) : "X" (ptr) ); \
21 (typeof(ptr))((*__ptr) + (offset)); }))
25 #define SHIFT_PERCPU_PTR(ptr, offset) (({ \
26 extern int simple_identifier_##var(void); \
27 unsigned long __ptr; \
28 asm ( "" : "=a" (__ptr) : "0" (ptr) ); \
29 (typeof(ptr)) (__ptr + (offset)); }))
33 #define __my_cpu_offset S390_lowcore.percpu_offset
35 #include <asm-generic/percpu.h>
37 #endif /* __ARCH_S390_PERCPU__ */
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