diff options
| author | Chunwei Chen <[email protected]> | 2015-05-11 22:22:56 +0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2015-08-24 10:13:25 -0700 |
| commit | 17888ae30d6111f1fe25087a256724ee9b1a0a84 (patch) | |
| tree | 7567dc20bcdd9045a3fac1761b1ac90626fdfeba /config/kernel-kmap-atomic-args.m4 | |
| parent | efc412b645cbb209e42983a9dcb9d3c9427c5495 (diff) | |
Add compatibility layer for {kmap,kunmap}_atomic
Starting from linux-2.6.37, {kmap,kunmap}_atomic takes 1 argument instead of 2.
We use zfs_{kmap,kunmap}_atomic as wrappers and always take 2 argument, but
ignore the 2nd for newer kernel.
Signed-off-by: Chunwei Chen <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'config/kernel-kmap-atomic-args.m4')
| -rw-r--r-- | config/kernel-kmap-atomic-args.m4 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/config/kernel-kmap-atomic-args.m4 b/config/kernel-kmap-atomic-args.m4 new file mode 100644 index 000000000..beb1692e7 --- /dev/null +++ b/config/kernel-kmap-atomic-args.m4 @@ -0,0 +1,20 @@ +dnl # +dnl # 2.6.37 API change +dnl # kmap_atomic changed from assigning hard-coded named slot to using +dnl # push/pop based dynamical allocation. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_KMAP_ATOMIC_ARGS], [ + AC_MSG_CHECKING([whether kmap_atomic wants 1 args]) + ZFS_LINUX_TRY_COMPILE([ + #include <linux/pagemap.h> + ],[ + struct page page; + kmap_atomic(&page); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_1ARG_KMAP_ATOMIC, 1, + [kmap_atomic wants 1 args]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |