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85391ee931
Sponsored-by: https://despairlabs.com/sponsor/ Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Signed-off-by: Rob Norris <robn@despairlabs.com> Closes #18077
35 lines
893 B
Plaintext
35 lines
893 B
Plaintext
dnl # SPDX-License-Identifier: CDDL-1.0
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dnl #
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dnl # Check for pin_user_pages_unlocked().
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_PIN_USER_PAGES], [
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ZFS_LINUX_TEST_SRC([pin_user_pages_unlocked], [
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#include <linux/mm.h>
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],[
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unsigned long start = 0;
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unsigned long nr_pages = 1;
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struct page **pages = NULL;
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unsigned int gup_flags = 0;
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long ret __attribute__ ((unused));
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ret = pin_user_pages_unlocked(start, nr_pages, pages,
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gup_flags);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_PIN_USER_PAGES], [
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dnl #
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dnl # Kernal 5.8 introduced the pin_user_pages* interfaces which should
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dnl # be used for Direct I/O requests.
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dnl #
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AC_MSG_CHECKING([whether pin_user_pages_unlocked() is available])
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ZFS_LINUX_TEST_RESULT([pin_user_pages_unlocked], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_PIN_USER_PAGES_UNLOCKED, 1,
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[pin_user_pages_unlocked() 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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