/arch/sparc/include/asm/current.h

https://bitbucket.org/ndreys/linux-sunxi · C++ Header · 34 lines · 15 code · 4 blank · 15 comment · 0 complexity · 5d4a6de9a68caccd9436481ad9b1e930 MD5 · raw file 

    

  1. /* include/asm/current.h
    2. 

  2.  *
    3. 

  3.  * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
    4. 

  4.  * Copyright (C) 2002 Pete Zaitcev (zaitcev@yahoo.com)
    5. 

  5.  * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
    6. 

  6.  *
    7. 

  7.  *  Derived from "include/asm-s390/current.h" by
    8. 

  8.  *  Martin Schwidefsky (schwidefsky@de.ibm.com)
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  9.  *  Derived from "include/asm-i386/current.h"
    10. 

  10. */
    11. 

  11. #ifndef _SPARC_CURRENT_H
    12. 

  12. #define _SPARC_CURRENT_H
    13. 

  13. 

  14. #include <linux/thread_info.h>
    15. 

  15. 

  16. #ifdef CONFIG_SPARC64
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  17. register struct task_struct *current asm("g4");
    18. 

  18. #endif
    19. 

  19. 

  20. #ifdef CONFIG_SPARC32
    21. 

  21. /* We might want to consider using %g4 like sparc64 to shave a few cycles.
    22. 

  22.  *
    23. 

  23.  * Two stage process (inline + #define) for type-checking.
    24. 

  24.  * We also obfuscate get_current() to check if anyone used that by mistake.
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  25.  */
    26. 

  26. struct task_struct;
    27. 

  27. static inline struct task_struct *__get_current(void)
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  28. {
    29. 

  29. 	return current_thread_info()->task;
    30. 

  30. }
    31. 

  31. #define current __get_current()
    32. 

  32. #endif
    33. 

  33. 

  34. #endif /* !(_SPARC_CURRENT_H) */
    35.