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tools
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include
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asm
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barrier.h

barrier.h 1.5 KB
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  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. #include <linux/compiler.h>
    3. 

  3. #if defined(__i386__) || defined(__x86_64__)
    4. 

  4. #include "../../arch/x86/include/asm/barrier.h"
    5. 

  5. #elif defined(__arm__)
    6. 

  6. #include "../../arch/arm/include/asm/barrier.h"
    7. 

  7. #elif defined(__aarch64__)
    8. 

  8. #include "../../arch/arm64/include/asm/barrier.h"
    9. 

  9. #elif defined(__powerpc__)
    10. 

  10. #include "../../arch/powerpc/include/asm/barrier.h"
    11. 

  11. #elif defined(__s390__)
    12. 

  12. #include "../../arch/s390/include/asm/barrier.h"
    13. 

  13. #elif defined(__sh__)
    14. 

  14. #include "../../arch/sh/include/asm/barrier.h"
    15. 

  15. #elif defined(__sparc__)
    16. 

  16. #include "../../arch/sparc/include/asm/barrier.h"
    17. 

  17. #elif defined(__tile__)
    18. 

  18. #include "../../arch/tile/include/asm/barrier.h"
    19. 

  19. #elif defined(__alpha__)
    20. 

  20. #include "../../arch/alpha/include/asm/barrier.h"
    21. 

  21. #elif defined(__mips__)
    22. 

  22. #include "../../arch/mips/include/asm/barrier.h"
    23. 

  23. #elif defined(__ia64__)
    24. 

  24. #include "../../arch/ia64/include/asm/barrier.h"
    25. 

  25. #elif defined(__xtensa__)
    26. 

  26. #include "../../arch/xtensa/include/asm/barrier.h"
    27. 

  27. #else
    28. 

  28. #include <asm-generic/barrier.h>
    29. 

  29. #endif
    30. 

  30. 

  31. /*
    32. 

  32.  * Generic fallback smp_*() definitions for archs that haven't
    33. 

  33.  * been updated yet.
    34. 

  34.  */
    35. 

  35. 

  36. #ifndef smp_rmb
    37. 

  37. # define smp_rmb()	rmb()
    38. 

  38. #endif
    39. 

  39. 

  40. #ifndef smp_wmb
    41. 

  41. # define smp_wmb()	wmb()
    42. 

  42. #endif
    43. 

  43. 

  44. #ifndef smp_mb
    45. 

  45. # define smp_mb()	mb()
    46. 

  46. #endif
    47. 

  47. 

  48. #ifndef smp_store_release
    49. 

  49. # define smp_store_release(p, v)		\
    50. 

  50. do {						\
    51. 

  51. 	smp_mb();				\
    52. 

  52. 	WRITE_ONCE(*p, v);			\
    53. 

  53. } while (0)
    54. 

  54. #endif
    55. 

  55. 

  56. #ifndef smp_load_acquire
    57. 

  57. # define smp_load_acquire(p)			\
    58. 

  58. ({						\
    59. 

  59. 	typeof(*p) ___p1 = READ_ONCE(*p);	\
    60. 

  60. 	smp_mb();				\
    61. 

  61. 	___p1;					\
    62. 

  62. })
    63. 

  63. #endif
    64.