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#ifndef _ASMARM_CURRENT_H #define _ASMARM_CURRENT_H static inline unsigned long get_sp(void) { unsigned long sp; __asm__ ("mov %0,sp" : "=r" (sp)); return sp; } /* Old compilers seem to generate bad code if we allow `current' to be non volatile. */ #if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ > 90) static inline struct task_struct *get_current(void) __attribute__ (( __const__ )); #define __VOLATILE_CURRENT #else #define __VOLATILE_CURRENT volatile #endif static inline struct task_struct *get_current(void) { struct task_struct *ts; __asm__ __VOLATILE_CURRENT ( "bic %0, sp, #0x1f00 @ get_current bic %0, %0, #0x00ff" : "=r" (ts)); return ts; } #define current (get_current()) #endif /* _ASMARM_CURRENT_H */ |