3fc92adc40
As of the 4.13 kernel filemap_range_has_page() can be used to check if there is a page mapped in a given file range. When available this interface should be used which eliminates the need for the zp->z_is_mapped boolean. Reviewed-by: Brian Atkinson <batkinson@lanl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #14493
27 lines
660 B
Plaintext
27 lines
660 B
Plaintext
dnl #
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dnl # filemap_range_has_page was not available till 4.13
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_FILEMAP], [
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ZFS_LINUX_TEST_SRC([filemap_range_has_page], [
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#include <linux/fs.h>
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],[
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struct address_space *mapping = NULL;
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loff_t lstart = 0;
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loff_t lend = 0;
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bool ret __attribute__ ((unused));
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ret = filemap_range_has_page(mapping, lstart, lend);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_FILEMAP], [
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AC_MSG_CHECKING([whether filemap_range_has_page() is available])
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ZFS_LINUX_TEST_RESULT([filemap_range_has_page], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_FILEMAP_RANGE_HAS_PAGE, 1,
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[filemap_range_has_page() is available])
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],[
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AC_MSG_RESULT(no)
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])
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])
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