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Perform KABI checks in parallel

Browse Source 
Reduce the time required for ./configure to perform the needed
KABI checks by allowing kbuild to compile multiple test cases in
parallel.  This was accomplished by splitting each test's source
code from the logic handling whether that code could be compiled
or not.

By introducing this split it's possible to minimize the number of
times kbuild needs to be invoked.  As importantly, it means all of
the tests can be built in parallel.  This does require a little extra
care since we expect some tests to fail, so the --keep-going (-k)
option must be provided otherwise some tests may not get compiled.
Furthermore, since a failure during the kbuild modpost phase will
result in an early exit; the final linking phase is limited to tests
which passed the initial compilation and produced an object file.

Once everything has been built the configure script proceeds as
previously.  The only significant difference is that it now merely
needs to test for the existence of a .ko file to determine the
result of a given test.  This vastly speeds up the entire process.

New test cases should use ZFS_LINUX_TEST_SRC to declare their test
source code and ZFS_LINUX_TEST_RESULT to check the result.  All of
the existing kernel-*.m4 files have been updated accordingly, see
config/kernel-current-time.m4 for a basic example.  The legacy
ZFS_LINUX_TRY_COMPILE macro has been kept to handle special cases
but it's use is not encouraged.

                  master (secs)   patched (secs)
                  -------------   ----------------
autogen.sh        61              68
configure         137             24  (~17% of current run time)
make -j $(nproc)  44              44
make rpms         287             150

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #8547 
Closes #9132
Closes #9341
This commit is contained in:
Brian Behlendorf
2019-10-01 12:50:34 -07:00
committed by GitHub
parent 99573cc053
commit 608f8749a1
118 changed files with 3262 additions and 2144 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/kernel-xattr-handler.m4
+250 -194
View File
@@ -3,9 +3,8 @@ dnl # 2.6.35 API change,
dnl # The 'struct xattr_handler' was constified in the generic
dnl # super_block structure.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_CONST_XATTR_HANDLER], [
AC_MSG_CHECKING([whether super_block uses const struct xattr_handler])
ZFS_LINUX_TRY_COMPILE([
AC_DEFUN([ZFS_AC_KERNEL_SRC_CONST_XATTR_HANDLER], [
ZFS_LINUX_TEST_SRC([const_xattr_handler], [
#include <linux/fs.h>
#include <linux/xattr.h>
@@ -22,11 +21,15 @@ AC_DEFUN([ZFS_AC_KERNEL_CONST_XATTR_HANDLER], [
const struct super_block sb __attribute__ ((unused)) = {
.s_xattr = xattr_handlers,
};
],[
],[
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_CONST_XATTR_HANDLER], [
AC_MSG_CHECKING([whether super_block uses const struct xattr_handler])
ZFS_LINUX_TEST_RESULT([const_xattr_handler], [
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_CONST_XATTR_HANDLER, 1,
[super_block uses const struct xattr_handler])
[super_block uses const struct xattr_handler])
],[
AC_MSG_RESULT([no])
])
@@ -38,17 +41,20 @@ dnl # struct xattr_handler added new member "name".
dnl # xattr_handler which matches to whole name rather than prefix should use
dnl # "name" instead of "prefix", e.g. "system.posix_acl_access"
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_NAME], [
AC_MSG_CHECKING([whether xattr_handler has name])
ZFS_LINUX_TRY_COMPILE([
AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_NAME], [
ZFS_LINUX_TEST_SRC([xattr_handler_name], [
#include <linux/xattr.h>
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.name = XATTR_NAME_POSIX_ACL_ACCESS,
};
],[
],[
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_NAME], [
AC_MSG_CHECKING([whether xattr_handler has name])
ZFS_LINUX_TEST_RESULT([xattr_handler_name], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_HANDLER_NAME, 1,
[xattr_handler has name])
@@ -57,42 +63,11 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_NAME], [
])
])
dnl #
dnl # 4.9 API change,
dnl # iops->{set,get,remove}xattr and generic_{set,get,remove}xattr are
dnl # removed. xattr operations will directly go through sb->s_xattr.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_HAVE_GENERIC_SETXATTR], [
AC_MSG_CHECKING([whether generic_setxattr() exists])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
#include <linux/xattr.h>
static const struct inode_operations
iops __attribute__ ((unused)) = {
.setxattr = generic_setxattr
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GENERIC_SETXATTR, 1,
[generic_setxattr() exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Supported xattr handler get() interfaces checked newest to oldest.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_GET], [
dnl #
dnl # 4.7 API change,
dnl # The xattr_handler->get() callback was changed to take both
dnl # dentry and inode.
dnl #
AC_MSG_CHECKING([whether xattr_handler->get() wants both dentry and inode])
ZFS_LINUX_TRY_COMPILE([
AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_GET], [
ZFS_LINUX_TEST_SRC([xattr_handler_get_dentry_inode], [
#include <linux/xattr.h>
int get(const struct xattr_handler *handler,
@@ -102,8 +77,52 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_GET], [
xops __attribute__ ((unused)) = {
.get = get,
};
],[
],[
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_get_xattr_handler], [
#include <linux/xattr.h>
int get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.get = get,
};
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_get_dentry], [
#include <linux/xattr.h>
int get(struct dentry *dentry, const char *name,
void *buffer, size_t size, int handler_flags)
{ return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.get = get,
};
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_get_inode], [
#include <linux/xattr.h>
int get(struct inode *ip, const char *name,
void *buffer, size_t size) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.get = get,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_GET], [
dnl #
dnl # 4.7 API change,
dnl # The xattr_handler->get() callback was changed to take both
dnl # dentry and inode.
dnl #
AC_MSG_CHECKING([whether xattr_handler->get() wants dentry and inode])
ZFS_LINUX_TEST_RESULT([xattr_handler_get_dentry_inode], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_GET_DENTRY_INODE, 1,
[xattr_handler->get() wants both dentry and inode])
@@ -115,69 +134,40 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_GET], [
dnl # should be accessed by handler->flags.
dnl #
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether xattr_handler->get() wants xattr_handler])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
int get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.get = get,
};
],[
],[
AC_MSG_CHECKING(
[whether xattr_handler->get() wants xattr_handler])
ZFS_LINUX_TEST_RESULT([xattr_handler_get_xattr_handler], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_GET_HANDLER, 1,
[xattr_handler->get() wants xattr_handler])
],[
dnl #
dnl # 2.6.33 API change,
dnl # The xattr_handler->get() callback was changed to take
dnl # a dentry instead of an inode, and a handler_flags
dnl # argument was added.
dnl # The xattr_handler->get() callback was changed
dnl # to take a dentry instead of an inode, and a
dnl # handler_flags argument was added.
dnl #
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether xattr_handler->get() wants dentry])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
int get(struct dentry *dentry, const char *name,
void *buffer, size_t size, int handler_flags)
{ return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.get = get,
};
],[
],[
AC_MSG_CHECKING(
[whether xattr_handler->get() wants dentry])
ZFS_LINUX_TEST_RESULT([xattr_handler_get_dentry], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_GET_DENTRY, 1,
[xattr_handler->get() wants dentry])
],[
dnl #
dnl # 2.6.32 API
dnl # Legacy 2.6.32 API
dnl #
AC_MSG_RESULT(no)
AC_MSG_CHECKING(
[whether xattr_handler->get() wants inode])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
int get(struct inode *ip, const char *name,
void *buffer, size_t size) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.get = get,
};
],[
],[
ZFS_LINUX_TEST_RESULT(
[xattr_handler_get_inode], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_GET_INODE, 1,
[xattr_handler->get() wants inode])
],[
AC_MSG_ERROR([no; please file a bug report])
ZFS_LINUX_TEST_ERROR([xattr get()])
])
])
])
@@ -187,14 +177,8 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_GET], [
dnl #
dnl # Supported xattr handler set() interfaces checked newest to oldest.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
dnl #
dnl # 4.7 API change,
dnl # The xattr_handler->set() callback was changed to take both
dnl # dentry and inode.
dnl #
AC_MSG_CHECKING([whether xattr_handler->set() wants both dentry and inode])
ZFS_LINUX_TRY_COMPILE([
AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_SET], [
ZFS_LINUX_TEST_SRC([xattr_handler_set_dentry_inode], [
#include <linux/xattr.h>
int set(const struct xattr_handler *handler,
@@ -206,8 +190,54 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
xops __attribute__ ((unused)) = {
.set = set,
};
],[
],[
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_set_xattr_handler], [
#include <linux/xattr.h>
int set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags)
{ return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.set = set,
};
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_set_dentry], [
#include <linux/xattr.h>
int set(struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags,
int handler_flags) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.set = set,
};
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_set_inode], [
#include <linux/xattr.h>
int set(struct inode *ip, const char *name,
const void *buffer, size_t size, int flags)
{ return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.set = set,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
dnl #
dnl # 4.7 API change,
dnl # The xattr_handler->set() callback was changed to take both
dnl # dentry and inode.
dnl #
AC_MSG_CHECKING([whether xattr_handler->set() wants dentry and inode])
ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry_inode], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_SET_DENTRY_INODE, 1,
[xattr_handler->set() wants both dentry and inode])
@@ -219,71 +249,40 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
dnl # should be accessed by handler->flags.
dnl #
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether xattr_handler->set() wants xattr_handler])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
int set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags)
{ return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.set = set,
};
],[
],[
AC_MSG_CHECKING(
[whether xattr_handler->set() wants xattr_handler])
ZFS_LINUX_TEST_RESULT([xattr_handler_set_xattr_handler], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_SET_HANDLER, 1,
[xattr_handler->set() wants xattr_handler])
],[
dnl #
dnl # 2.6.33 API change,
dnl # The xattr_handler->set() callback was changed to take a
dnl # dentry instead of an inode, and a handler_flags
dnl # argument was added.
dnl # The xattr_handler->set() callback was changed
dnl # to take a dentry instead of an inode, and a
dnl # handler_flags argument was added.
dnl #
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether xattr_handler->set() wants dentry])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
int set(struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags,
int handler_flags) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.set = set,
};
],[
],[
AC_MSG_CHECKING(
[whether xattr_handler->set() wants dentry])
ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_SET_DENTRY, 1,
[xattr_handler->set() wants dentry])
],[
dnl #
dnl # 2.6.32 API
dnl # Legacy 2.6.32 API
dnl #
AC_MSG_RESULT(no)
AC_MSG_CHECKING(
[whether xattr_handler->set() wants inode])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
int set(struct inode *ip, const char *name,
const void *buffer, size_t size, int flags)
{ return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.set = set,
};
],[
],[
ZFS_LINUX_TEST_RESULT(
[xattr_handler_set_inode], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_SET_INODE, 1,
[xattr_handler->set() wants inode])
],[
AC_MSG_ERROR([no; please file a bug report])
ZFS_LINUX_TEST_ERROR([xattr set()])
])
])
])
@@ -293,12 +292,8 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
dnl #
dnl # Supported xattr handler list() interfaces checked newest to oldest.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_LIST], [
dnl # 4.5 API change,
dnl # The xattr_handler->list() callback was changed to take only a
dnl # dentry and it only needs to return if it's accessible.
AC_MSG_CHECKING([whether xattr_handler->list() wants simple])
ZFS_LINUX_TRY_COMPILE([
AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_LIST], [
ZFS_LINUX_TEST_SRC([xattr_handler_list_simple], [
#include <linux/xattr.h>
bool list(struct dentry *dentry) { return 0; }
@@ -306,8 +301,52 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_LIST], [
xops __attribute__ ((unused)) = {
.list = list,
};
],[
],[
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_list_xattr_handler], [
#include <linux/xattr.h>
size_t list(const struct xattr_handler *handler,
struct dentry *dentry, char *list, size_t list_size,
const char *name, size_t name_len) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.list = list,
};
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_list_dentry], [
#include <linux/xattr.h>
size_t list(struct dentry *dentry,
char *list, size_t list_size,
const char *name, size_t name_len,
int handler_flags) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.list = list,
};
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_list_inode], [
#include <linux/xattr.h>
size_t list(struct inode *ip, char *lst,
size_t list_size, const char *name,
size_t name_len) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.list = list,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_LIST], [
dnl # 4.5 API change,
dnl # The xattr_handler->list() callback was changed to take only a
dnl # dentry and it only needs to return if it's accessible.
AC_MSG_CHECKING([whether xattr_handler->list() wants simple])
ZFS_LINUX_TEST_RESULT([xattr_handler_list_simple], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_LIST_SIMPLE, 1,
[xattr_handler->list() wants simple])
@@ -321,18 +360,7 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_LIST], [
AC_MSG_RESULT(no)
AC_MSG_CHECKING(
[whether xattr_handler->list() wants xattr_handler])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
size_t list(const struct xattr_handler *handler,
struct dentry *dentry, char *list, size_t list_size,
const char *name, size_t name_len) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.list = list,
};
],[
],[
ZFS_LINUX_TEST_RESULT([xattr_handler_list_xattr_handler], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_LIST_HANDLER, 1,
[xattr_handler->list() wants xattr_handler])
@@ -346,47 +374,24 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_LIST], [
AC_MSG_RESULT(no)
AC_MSG_CHECKING(
[whether xattr_handler->list() wants dentry])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
size_t list(struct dentry *dentry,
char *list, size_t list_size,
const char *name, size_t name_len,
int handler_flags) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.list = list,
};
],[
],[
ZFS_LINUX_TEST_RESULT([xattr_handler_list_dentry], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_LIST_DENTRY, 1,
[xattr_handler->list() wants dentry])
],[
dnl #
dnl # 2.6.32 API
dnl # Legacy 2.6.32 API
dnl #
AC_MSG_RESULT(no)
AC_MSG_CHECKING(
[whether xattr_handler->list() wants inode])
ZFS_LINUX_TRY_COMPILE([
#include <linux/xattr.h>
size_t list(struct inode *ip, char *lst,
size_t list_size, const char *name,
size_t name_len) { return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.list = list,
};
],[
],[
ZFS_LINUX_TEST_RESULT(
[xattr_handler_list_inode], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_LIST_INODE, 1,
[xattr_handler->list() wants inode])
],[
AC_MSG_ERROR(
[no; please file a bug report])
ZFS_LINUX_TEST_ERROR([xattr list()])
])
])
])
@@ -398,15 +403,19 @@ dnl # 3.7 API change,
dnl # The posix_acl_{from,to}_xattr functions gained a new
dnl # parameter: user_ns
dnl #
AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS], [
AC_MSG_CHECKING([whether posix_acl_from_xattr() needs user_ns])
ZFS_LINUX_TRY_COMPILE([
AC_DEFUN([ZFS_AC_KERNEL_SRC_POSIX_ACL_FROM_XATTR_USERNS], [
ZFS_LINUX_TEST_SRC([posix_acl_from_xattr_userns], [
#include <linux/cred.h>
#include <linux/fs.h>
#include <linux/posix_acl_xattr.h>
],[
posix_acl_from_xattr(&init_user_ns, NULL, 0);
],[
])
])
AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS], [
AC_MSG_CHECKING([whether posix_acl_from_xattr() needs user_ns])
ZFS_LINUX_TEST_RESULT([posix_acl_from_xattr_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_POSIX_ACL_FROM_XATTR_USERNS, 1,
[posix_acl_from_xattr() needs user_ns])
@@ -415,3 +424,50 @@ AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS], [
])
])
dnl #
dnl # 4.9 API change,
dnl # iops->{set,get,remove}xattr and generic_{set,get,remove}xattr are
dnl # removed. xattr operations will directly go through sb->s_xattr.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_SETXATTR], [
ZFS_LINUX_TEST_SRC([have_generic_setxattr], [
#include <linux/fs.h>
#include <linux/xattr.h>
static const struct inode_operations
iops __attribute__ ((unused)) = {
.setxattr = generic_setxattr
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_GENERIC_SETXATTR], [
AC_MSG_CHECKING([whether generic_setxattr() exists])
ZFS_LINUX_TEST_RESULT([have_generic_setxattr], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GENERIC_SETXATTR, 1,
[generic_setxattr() exists])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR], [
ZFS_AC_KERNEL_SRC_CONST_XATTR_HANDLER
ZFS_AC_KERNEL_SRC_XATTR_HANDLER_NAME
ZFS_AC_KERNEL_SRC_XATTR_HANDLER_GET
ZFS_AC_KERNEL_SRC_XATTR_HANDLER_SET
ZFS_AC_KERNEL_SRC_XATTR_HANDLER_LIST
ZFS_AC_KERNEL_SRC_POSIX_ACL_FROM_XATTR_USERNS
ZFS_AC_KERNEL_SRC_GENERIC_SETXATTR
])
AC_DEFUN([ZFS_AC_KERNEL_XATTR], [
ZFS_AC_KERNEL_CONST_XATTR_HANDLER
ZFS_AC_KERNEL_XATTR_HANDLER_NAME
ZFS_AC_KERNEL_XATTR_HANDLER_GET
ZFS_AC_KERNEL_XATTR_HANDLER_SET
ZFS_AC_KERNEL_XATTR_HANDLER_LIST
ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS
ZFS_AC_KERNEL_GENERIC_SETXATTR
])