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config: remove HAVE_KMEM_CACHE_CREATE_USERCOPY

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Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #16479
This commit is contained in:
Rob Norris 2024-08-24 20:52:58 +10:00 committed by Brian Behlendorf
parent 536a0a8a84
commit 2c84b59e73
3 changed files with 0 additions and 60 deletions
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41
config/kernel-kmem-cache.m4
View File

@ -1,41 +0,0 @@
dnl #
dnl # grsecurity API change,
dnl # kmem_cache_create() with SLAB_USERCOPY flag replaced by
dnl # kmem_cache_create_usercopy().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_KMEM_CACHE_CREATE_USERCOPY], [
ZFS_LINUX_TEST_SRC([kmem_cache_create_usercopy], [
#include <linux/slab.h>
static void ctor(void *foo) { /* fake ctor */ }
],[
struct kmem_cache *skc_linux_cache;
const char *name = "test";
size_t size = 4096;
size_t align = 8;
unsigned long flags = 0;
size_t useroffset = 0;
size_t usersize = size - useroffset;
skc_linux_cache = kmem_cache_create_usercopy(
name, size, align, flags, useroffset, usersize, ctor);
])
])
AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY], [
AC_MSG_CHECKING([whether kmem_cache_create_usercopy() exists])
ZFS_LINUX_TEST_RESULT([kmem_cache_create_usercopy], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KMEM_CACHE_CREATE_USERCOPY, 1,
[kmem_cache_create_usercopy() exists])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_KMEM_CACHE], [
ZFS_AC_KERNEL_SRC_KMEM_CACHE_CREATE_USERCOPY
])
AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE], [
ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY
])

2
config/kernel.m4
View File

@ -45,7 +45,6 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_GENERIC_FADVISE
ZFS_AC_KERNEL_SRC_SCHED
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
@ -164,7 +163,6 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_GENERIC_FADVISE
ZFS_AC_KERNEL_SCHED
ZFS_AC_KERNEL_USLEEP_RANGE
ZFS_AC_KERNEL_KMEM_CACHE
ZFS_AC_KERNEL_KVMALLOC
ZFS_AC_KERNEL_VMALLOC_PAGE_KERNEL
ZFS_AC_KERNEL_WAIT

17
module/os/linux/spl/spl-kmem-cache.c
View File

@ -786,25 +786,8 @@ spl_kmem_cache_create(const char *name, size_t size, size_t align,
if (skc->skc_flags & KMC_RECLAIMABLE)
slabflags |= SLAB_RECLAIM_ACCOUNT;
#if defined(SLAB_USERCOPY)
/*
* Required for PAX-enabled kernels if the slab is to be
* used for copying between user and kernel space.
*/
slabflags |= SLAB_USERCOPY;
#endif
#if defined(HAVE_KMEM_CACHE_CREATE_USERCOPY)
/*
* Newer grsec patchset uses kmem_cache_create_usercopy()
* instead of SLAB_USERCOPY flag
*/
skc->skc_linux_cache = kmem_cache_create_usercopy(
skc->skc_name, size, align, slabflags, 0, size, NULL);
#else
skc->skc_linux_cache = kmem_cache_create(
skc->skc_name, size, align, slabflags, NULL);
#endif
if (skc->skc_linux_cache == NULL)
goto out;
}