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Linux 5.8 compat: __vmalloc()

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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
This commit is contained in:
Michael Niewöhner
2020-06-09 01:32:02 +02:00
committed by GitHub
parent 529246df96
commit 080102a1b6
5 changed files with 46 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/kernel-kmem.m4
+26
View File
@@ -80,3 +80,29 @@ AC_DEFUN([ZFS_AC_KERNEL_KVMALLOC], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 5.8 API,
dnl # __vmalloc PAGE_KERNEL removal
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_VMALLOC_PAGE_KERNEL], [
ZFS_LINUX_TEST_SRC([__vmalloc], [
#include <linux/mm.h>
#include <linux/vmalloc.h>
],[
void *p __attribute__ ((unused));
p = __vmalloc(0, GFP_KERNEL, PAGE_KERNEL);
])
])
AC_DEFUN([ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL], [
AC_MSG_CHECKING([whether __vmalloc(ptr, flags, pageflags) is available])
ZFS_LINUX_TEST_RESULT([__vmalloc], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_VMALLOC_PAGE_KERNEL, 1, [__vmalloc page flags exists])
],[
AC_MSG_RESULT(no)
])
])
-
config/kernel.m4
+2
View File
@@ -47,6 +47,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_USLEEP_RANGE
ZFS_AC_KERNEL_SRC_KMEM_CACHE
ZFS_AC_KERNEL_SRC_KVMALLOC
ZFS_AC_KERNEL_SRC_VMALLOC_PAGE_KERNEL
ZFS_AC_KERNEL_SRC_WAIT
ZFS_AC_KERNEL_SRC_INODE_TIMES
ZFS_AC_KERNEL_SRC_INODE_LOCK
@@ -141,6 +142,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_USLEEP_RANGE
ZFS_AC_KERNEL_KMEM_CACHE
ZFS_AC_KERNEL_KVMALLOC
ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL
ZFS_AC_KERNEL_WAIT
ZFS_AC_KERNEL_INODE_TIMES
ZFS_AC_KERNEL_INODE_LOCK