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638edf1d42
The `pgprot` argument has been removed from `__vmalloc` in Linux 5.8,
being `PAGE_KERNEL` always now [1].
Detect this during configure and define a wrapper for older kernels.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/mm/vmalloc.c?h=next-20200605&id=88dca4ca5a93d2c09e5bbc6a62fbfc3af83c4fca
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Co-authored-by: Michael Niewöhner <foss@mniewoehner.de>
Signed-off-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Closes #10422
(cherry picked from commit 080102a1b6)
- apply to 0.8.4 before certain files were moved around
- config/kernel-kmem.m4 exists in git but not release tarballs because
it is unused; introduce it in a new file to prevent conflicts
- linux/mm.h is included in git master via sys/kmem.h; do not remove it
here or the build will error due to undefined is_vmalloc_addr()
Original-patch-by: Michael Niewöhner <c0d3z3r0@users.noreply.github.com>
Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
25 lines
583 B
Plaintext
25 lines
583 B
Plaintext
dnl #
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dnl # 5.8 API,
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dnl # __vmalloc PAGE_KERNEL removal
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_VMALLOC_PAGE_KERNEL], [
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ZFS_LINUX_TEST_SRC([__vmalloc], [
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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],[
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void *p __attribute__ ((unused));
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p = __vmalloc(0, GFP_KERNEL, PAGE_KERNEL);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL], [
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AC_MSG_CHECKING([whether __vmalloc(ptr, flags, pageflags) is available])
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ZFS_LINUX_TEST_RESULT([__vmalloc], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_VMALLOC_PAGE_KERNEL, 1, [__vmalloc page flags exists])
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],[
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AC_MSG_RESULT(no)
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])
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])
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