24 lines
635 B
Text
24 lines
635 B
Text
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dnl #
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dnl # 4.7 API change
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dnl # i_mutex is changed to i_rwsem. Instead of directly using
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dnl # i_mutex/i_rwsem, we should use inode_lock() and inode_lock_shared()
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dnl # We test inode_lock_shared because inode_lock is introduced earlier.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_INODE_LOCK], [
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AC_MSG_CHECKING([whether inode_lock_shared() exists])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Werror"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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],[
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struct inode *inode = NULL;
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inode_lock_shared(inode);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_INODE_LOCK_SHARED, 1, [yes])
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],[
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AC_MSG_RESULT(no)
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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