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The BIO_MAX_PAGES macro is being retired in favor of a bio_max_segs() function that implements the typical MIN(x,y) logic used throughout the kernel for bounding the allocation, and also the new implementation is intended to be signed-safe (which the former was not). Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Coleman Kane <ckane@colemankane.org> Closes #11765
24 lines
577 B
Plaintext
24 lines
577 B
Plaintext
dnl #
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dnl # 5.12 API change removes BIO_MAX_PAGES in favor of bio_max_segs()
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dnl # which will handle the logic of setting the upper-bound to a
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dnl # BIO_MAX_PAGES, internally.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_MAX_SEGS], [
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ZFS_LINUX_TEST_SRC([bio_max_segs], [
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#include <linux/bio.h>
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],[
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bio_max_segs(1);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_BIO_MAX_SEGS], [
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AC_MSG_CHECKING([whether bio_max_segs() exists])
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ZFS_LINUX_TEST_RESULT([bio_max_segs], [
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AC_MSG_RESULT(yes)
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AC_DEFINE([HAVE_BIO_MAX_SEGS], 1, [bio_max_segs() is implemented])
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],[
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AC_MSG_RESULT(no)
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])
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])
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