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17888ae30d
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 <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
21 lines
486 B
Plaintext
21 lines
486 B
Plaintext
dnl #
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dnl # 2.6.37 API change
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dnl # kmap_atomic changed from assigning hard-coded named slot to using
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dnl # push/pop based dynamical allocation.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_KMAP_ATOMIC_ARGS], [
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AC_MSG_CHECKING([whether kmap_atomic wants 1 args])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/pagemap.h>
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],[
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struct page page;
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kmap_atomic(&page);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_1ARG_KMAP_ATOMIC, 1,
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[kmap_atomic wants 1 args])
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],[
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AC_MSG_RESULT(no)
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])
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])
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