diff options
| author | Brian Behlendorf <[email protected]> | 2011-11-07 16:39:03 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2011-11-08 10:19:03 -0800 |
| commit | 5547c2f1bf49802835fd6c52f15115ba344a2a8b (patch) | |
| tree | 7e2314465d7a0ad5b6922c1d385b6c8ffa4e7979 /config/kernel-bdi-setup-and-register.m4 | |
| parent | 591fb62f19ee2431983a4cbeb0d200b1b8e7daf5 (diff) | |
Simplify BDI integration
Update the code to use the bdi_setup_and_register() helper to
simplify the bdi integration code. The updated code now just
registers the bdi during mount and destroys it during unmount.
The only complication is that for 2.6.32 - 2.6.33 kernels the
helper wasn't available so in these cases the zfs code must
provide it. Luckily the bdi_setup_and_register() function
is trivial.
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #367
Diffstat (limited to 'config/kernel-bdi-setup-and-register.m4')
| -rw-r--r-- | config/kernel-bdi-setup-and-register.m4 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/config/kernel-bdi-setup-and-register.m4 b/config/kernel-bdi-setup-and-register.m4 new file mode 100644 index 000000000..56fab8757 --- /dev/null +++ b/config/kernel-bdi-setup-and-register.m4 @@ -0,0 +1,15 @@ +dnl # +dnl # 2.6.34 API change +dnl # The bdi_setup_and_register() helper function is avilable and +dnl # exported by the kernel. This is a trivial helper function but +dnl # using it significantly simplifies the code surrounding setting +dnl # up and tearing down the bdi structure. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER], [ + ZFS_CHECK_SYMBOL_EXPORT( + [bdi_setup_and_register], + [mm/backing-dev.c], + [AC_DEFINE(HAVE_BDI_SETUP_AND_REGISTER, 1, + [bdi_setup_and_register() is available])], + []) +]) |