projects / mirror_spl-debian.git / blame
| Commit | Line | Data |
|---|---|---|
| 34ee731f AX |
1 | AC_DEFUN([SPL_AC_SHRINKER_CALLBACK],[ |
| 2 | tmp_flags="$EXTRA_KCFLAGS" | |
| 3 | EXTRA_KCFLAGS="-Werror" | |
| 4 | dnl # | |
| 5 | dnl # 2.6.23 to 2.6.34 API change | |
| 6 | dnl # ->shrink(int nr_to_scan, gfp_t gfp_mask) | |
| 7 | dnl # | |
| 8 | AC_MSG_CHECKING([whether old 2-argument shrinker exists]) | |
| 9 | SPL_LINUX_TRY_COMPILE([ | |
| 10 | #include <linux/mm.h> | |
| 11 | ||
| 12 | int shrinker_cb(int nr_to_scan, gfp_t gfp_mask); | |
| 13 | ],[ | |
| 14 | struct shrinker cache_shrinker = { | |
| 15 | .shrink = shrinker_cb, | |
| 16 | .seeks = DEFAULT_SEEKS, | |
| 17 | }; | |
| 18 | register_shrinker(&cache_shrinker); | |
| 19 | ],[ | |
| 20 | AC_MSG_RESULT(yes) | |
| 21 | AC_DEFINE(HAVE_2ARGS_OLD_SHRINKER_CALLBACK, 1, | |
| 22 | [old shrinker callback wants 2 args]) | |
| 23 | ],[ | |
| 24 | AC_MSG_RESULT(no) | |
| 25 | dnl # | |
| 26 | dnl # 2.6.35 - 2.6.39 API change | |
| 27 | dnl # ->shrink(struct shrinker *, | |
| 28 | dnl # int nr_to_scan, gfp_t gfp_mask) | |
| 29 | dnl # | |
| 30 | AC_MSG_CHECKING([whether old 3-argument shrinker exists]) | |
| 31 | SPL_LINUX_TRY_COMPILE([ | |
| 32 | #include <linux/mm.h> | |
| 33 | ||
| 34 | int shrinker_cb(struct shrinker *, int nr_to_scan, | |
| 35 | gfp_t gfp_mask); | |
| 36 | ],[ | |
| 37 | struct shrinker cache_shrinker = { | |
| 38 | .shrink = shrinker_cb, | |
| 39 | .seeks = DEFAULT_SEEKS, | |
| 40 | }; | |
| 41 | register_shrinker(&cache_shrinker); | |
| 42 | ],[ | |
| 43 | AC_MSG_RESULT(yes) | |
| 44 | AC_DEFINE(HAVE_3ARGS_SHRINKER_CALLBACK, 1, | |
| 45 | [old shrinker callback wants 3 args]) | |
| 46 | ],[ | |
| 47 | AC_MSG_RESULT(no) | |
| 48 | dnl # | |
| 49 | dnl # 3.0 - 3.11 API change | |
| 50 | dnl # ->shrink(struct shrinker *, | |
| 51 | dnl # struct shrink_control *sc) | |
| 52 | dnl # | |
| 53 | AC_MSG_CHECKING( | |
| 54 | [whether new 2-argument shrinker exists]) | |
| 55 | SPL_LINUX_TRY_COMPILE([ | |
| 56 | #include <linux/mm.h> | |
| 57 | ||
| 58 | int shrinker_cb(struct shrinker *, | |
| 59 | struct shrink_control *sc); | |
| 60 | ],[ | |
| 61 | struct shrinker cache_shrinker = { | |
| 62 | .shrink = shrinker_cb, | |
| 63 | .seeks = DEFAULT_SEEKS, | |
| 64 | }; | |
| 65 | register_shrinker(&cache_shrinker); | |
| 66 | ],[ | |
| 67 | AC_MSG_RESULT(yes) | |
| 68 | AC_DEFINE(HAVE_2ARGS_NEW_SHRINKER_CALLBACK, 1, | |
| 69 | [new shrinker callback wants 2 args]) | |
| 70 | ],[ | |
| 71 | AC_MSG_RESULT(no) | |
| 72 | dnl # | |
| 73 | dnl # 3.12 API change, | |
| 74 | dnl # ->shrink() is logically split in to | |
| 75 | dnl # ->count_objects() and ->scan_objects() | |
| 76 | dnl # | |
| 77 | AC_MSG_CHECKING( | |
| 78 | [whether ->count_objects callback exists]) | |
| 79 | SPL_LINUX_TRY_COMPILE([ | |
| 80 | #include <linux/mm.h> | |
| 81 | ||
| 82 | unsigned long shrinker_cb( | |
| 83 | struct shrinker *, | |
| 84 | struct shrink_control *sc); | |
| 85 | ],[ | |
| 86 | struct shrinker cache_shrinker = { | |
| 87 | .count_objects = shrinker_cb, | |
| 88 | .scan_objects = shrinker_cb, | |
| 89 | .seeks = DEFAULT_SEEKS, | |
| 90 | }; | |
| 91 | register_shrinker(&cache_shrinker); | |
| 92 | ],[ | |
| 93 | AC_MSG_RESULT(yes) | |
| 94 | AC_DEFINE(HAVE_SPLIT_SHRINKER_CALLBACK, | |
| 95 | 1, [->count_objects exists]) | |
| 96 | ],[ | |
| 97 | AC_MSG_ERROR(error) | |
| 98 | ]) | |
| 99 | ]) | |
| 100 | ]) | |
| 101 | ]) | |
| 102 | EXTRA_KCFLAGS="$tmp_flags" | |
| 103 | ]) | |
| 104 | ||
| 105 | dnl # | |
| 106 | dnl # 2.6.39 API change, | |
| 107 | dnl # Shrinker adjust to use common shrink_control structure. | |
| 108 | dnl # | |
| 109 | AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [ | |
| 110 | AC_MSG_CHECKING([whether struct shrink_control exists]) | |
| 111 | SPL_LINUX_TRY_COMPILE([ | |
| 112 | #include <linux/mm.h> | |
| 113 | ],[ | |
| 114 | struct shrink_control sc __attribute__ ((unused)); | |
| 115 | ||
| 116 | sc.nr_to_scan = 0; | |
| 117 | sc.gfp_mask = GFP_KERNEL; | |
| 118 | ],[ | |
| 119 | AC_MSG_RESULT(yes) | |
| 120 | AC_DEFINE(HAVE_SHRINK_CONTROL_STRUCT, 1, | |
| 121 | [struct shrink_control exists]) | |
| 122 | ],[ | |
| 123 | AC_MSG_RESULT(no) | |
| 124 | ]) | |
| 125 | ]) |