diff options
| author | Brian Behlendorf <[email protected]> | 2017-05-02 09:46:18 -0700 |
|---|---|---|
| committer | GitHub <[email protected]> | 2017-05-02 09:46:18 -0700 |
| commit | 7dae2c81e7b2e68a596c5b431444be0fae308156 (patch) | |
| tree | 7581727a7905b990c1f823592c47e9a0a50e1942 /config/kernel-bdi.m4 | |
| parent | 153b2285545509c082be56dbf3ba5041de5d6e48 (diff) | |
Linux 4.12 compat: super_setup_bdi_name()
All filesystems were converted to dynamically allocated BDIs. The
destruction of backing_dev_info structures is handled as part of
super block destruction. Refactor the code to abstract away the
details of creating and destroying a BDI.
Reviewed-by: Chunwei Chen <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #6089
Diffstat (limited to 'config/kernel-bdi.m4')
| -rw-r--r-- | config/kernel-bdi.m4 | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/config/kernel-bdi.m4 b/config/kernel-bdi.m4 new file mode 100644 index 000000000..c2a9dd28b --- /dev/null +++ b/config/kernel-bdi.m4 @@ -0,0 +1,56 @@ +dnl # +dnl # 2.6.32 - 2.6.33, bdi_setup_and_register() is not exported. +dnl # 2.6.34 - 3.19, bdi_setup_and_register() takes 3 arguments. +dnl # 4.0 - 4.11, bdi_setup_and_register() takes 2 arguments. +dnl # 4.12 - x.y, super_setup_bdi_name() new interface. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_BDI], [ + AC_MSG_CHECKING([whether super_setup_bdi_name() exists]) + ZFS_LINUX_TRY_COMPILE_SYMBOL([ + #include <linux/fs.h> + struct super_block sb; + ], [ + char *name = "bdi"; + int error __attribute__((unused)) = + super_setup_bdi_name(&sb, name); + ], [super_setup_bdi_name], [fs/super.c], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_SUPER_SETUP_BDI_NAME, 1, + [super_setup_bdi_name() exits]) + ], [ + AC_MSG_RESULT(no) + AC_MSG_CHECKING( + [whether bdi_setup_and_register() wants 2 args]) + ZFS_LINUX_TRY_COMPILE_SYMBOL([ + #include <linux/backing-dev.h> + struct backing_dev_info bdi; + ], [ + char *name = "bdi"; + int error __attribute__((unused)) = + bdi_setup_and_register(&bdi, name); + ], [bdi_setup_and_register], [mm/backing-dev.c], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_2ARGS_BDI_SETUP_AND_REGISTER, 1, + [bdi_setup_and_register() wants 2 args]) + ], [ + AC_MSG_RESULT(no) + AC_MSG_CHECKING( + [whether bdi_setup_and_register() wants 3 args]) + ZFS_LINUX_TRY_COMPILE_SYMBOL([ + #include <linux/backing-dev.h> + struct backing_dev_info bdi; + ], [ + char *name = "bdi"; + unsigned int cap = BDI_CAP_MAP_COPY; + int error __attribute__((unused)) = + bdi_setup_and_register(&bdi, name, cap); + ], [bdi_setup_and_register], [mm/backing-dev.c], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_3ARGS_BDI_SETUP_AND_REGISTER, 1, + [bdi_setup_and_register() wants 3 args]) + ], [ + AC_MSG_RESULT(no) + ]) + ]) + ]) +]) |