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authorAndrew Bartlett <abartlet@samba.org>2003-04-06 12:01:44 +0000
committerAndrew Bartlett <abartlet@samba.org>2003-04-06 12:01:44 +0000
commit98f76325542c0ab2e0bbcf082a15c6f8db27e37c (patch)
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If the string does not convert back, print the buggy result.
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__my_cpu_offset #endif #ifndef MODULE #define SHIFT_PERCPU_PTR(var, offset) RELOC_HIDE(&per_cpu_var(var), (offset)) #define PER_CPU_ATTRIBUTES #else /* * To calculate addresses of locally defined variables, GCC uses 32-bit * displacement from the GP. Which doesn't work for per cpu variables in * modules, as an offset to the kernel per cpu area is way above 4G. * * This forces allocation of a GOT entry for per cpu variable using * ldq instruction with a 'literal' relocation. */ #define SHIFT_PERCPU_PTR(var, offset) ({ \ extern int simple_identifier_##var(void); \ unsigned long __ptr, tmp_gp; \ asm ( "br %1, 1f \n\ 1: ldgp %1, 0(%1) \n\ ldq %0, per_cpu__" #var"(%1)\t!literal" \ : "=&r"(__ptr), "=&r"(tmp_gp)); \ (typeof(&per_cpu_var(var)))(__ptr + (offset)); }) #define PER_CPU_ATTRIBUTES __used #endif /* MODULE */ /* * A percpu variable may point to a discarded regions. The following are * established ways to produce a usable pointer from the percpu variable * offset. */ #define per_cpu(var, cpu) \ (*SHIFT_PERCPU_PTR(var, per_cpu_offset(cpu))) #define __get_cpu_var(var) \ (*SHIFT_PERCPU_PTR(var, my_cpu_offset)) #define __raw_get_cpu_var(var) \ (*SHIFT_PERCPU_PTR(var, __my_cpu_offset)) #else /* ! SMP */ #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu_var(var))) #define __get_cpu_var(var) per_cpu_var(var) #define __raw_get_cpu_var(var) per_cpu_var(var) #define PER_CPU_ATTRIBUTES #endif /* SMP */ #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu_var(name) #endif /* __ALPHA_PERCPU_H */