Linux 5.11 compat: conftest

Update the ZFS_LINUX_TEST_PROGRAM macro to always set the module
license.  As of the 5.11 kernel not setting a license has been
converted from a warning to an error.

Reviewed-by: Rafael Kitover <[email protected]>
Reviewed-by: Coleman Kane <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #11387
Closes #11390

6 files changed, 28 insertions, 17 deletions

diff --git a/config/kernel-acl.m4 b/config/kernel-acl.m4
index 0f1c24656..e02ce6653 100644
--- a/config/kernel-acl.m4
+++ b/config/kernel-acl.m4
@@ -11,7 +11,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_POSIX_ACL_RELEASE], [
 	], [
 		struct posix_acl *tmp = posix_acl_alloc(1, 0);
 		posix_acl_release(tmp);
-	], [], [$ZFS_META_LICENSE])
+	], [], [ZFS_META_LICENSE])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_POSIX_ACL_RELEASE], [
@@ -50,7 +50,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_SET_CACHED_ACL_USABLE], [
 		struct posix_acl *acl = posix_acl_alloc(1, 0);
 		set_cached_acl(ip, ACL_TYPE_ACCESS, acl);
 		forget_cached_acl(ip, ACL_TYPE_ACCESS);
-	], [], [$ZFS_META_LICENSE])
+	], [], [ZFS_META_LICENSE])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_SET_CACHED_ACL_USABLE], [
diff --git a/config/kernel-bio.m4 b/config/kernel-bio.m4
index 534282780..0c533531d 100644
--- a/config/kernel-bio.m4
+++ b/config/kernel-bio.m4
@@ -188,7 +188,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_SET_DEV], [
 		struct block_device *bdev = NULL;
 		struct bio *bio = NULL;
 		bio_set_dev(bio, bdev);
-	], [], [$ZFS_META_LICENSE])
+	], [], [ZFS_META_LICENSE])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV], [
@@ -347,7 +347,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKG_TRYGET], [
 		struct blkcg_gq blkg __attribute__ ((unused)) = {};
 		bool rc __attribute__ ((unused));
 		rc = blkg_tryget(&blkg);
-	], [], [$ZFS_META_LICENSE])
+	], [], [ZFS_META_LICENSE])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_BLKG_TRYGET], [
diff --git a/config/kernel-blk-queue.m4 b/config/kernel-blk-queue.m4
index 382ebefd3..ff2da92e9 100644
--- a/config/kernel-blk-queue.m4
+++ b/config/kernel-blk-queue.m4
@@ -179,7 +179,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLUSH], [
 	], [
 		struct request_queue *q = NULL;
 		(void) blk_queue_flush(q, REQ_FLUSH);
-	], [$NO_UNUSED_BUT_SET_VARIABLE], [$ZFS_META_LICENSE])
+	], [$NO_UNUSED_BUT_SET_VARIABLE], [ZFS_META_LICENSE])
 
 	ZFS_LINUX_TEST_SRC([blk_queue_write_cache], [
 		#include <linux/kernel.h>
@@ -187,7 +187,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLK_QUEUE_FLUSH], [
 	], [
 		struct request_queue *q = NULL;
 		blk_queue_write_cache(q, true, true);
-	], [$NO_UNUSED_BUT_SET_VARIABLE], [$ZFS_META_LICENSE])
+	], [$NO_UNUSED_BUT_SET_VARIABLE], [ZFS_META_LICENSE])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_BLK_QUEUE_FLUSH], [
diff --git a/config/kernel-config-defined.m4 b/config/kernel-config-defined.m4
index fe778e649..9b9468269 100644
--- a/config/kernel-config-defined.m4
+++ b/config/kernel-config-defined.m4
@@ -86,7 +86,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_DEBUG_LOCK_ALLOC], [
 		mutex_init(&lock);
 		mutex_lock(&lock);
 		mutex_unlock(&lock);
-	], [], [$ZFS_META_LICENSE])
+	], [], [ZFS_META_LICENSE])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
diff --git a/config/kernel-fpu.m4 b/config/kernel-fpu.m4
index 3c7933413..4d6fe0522 100644
--- a/config/kernel-fpu.m4
+++ b/config/kernel-fpu.m4
@@ -42,7 +42,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_FPU], [
 	], [
 		kernel_fpu_begin();
 		kernel_fpu_end();
-	], [], [$ZFS_META_LICENSE])
+	], [], [ZFS_META_LICENSE])
 
 	ZFS_LINUX_TEST_SRC([__kernel_fpu], [
 		#include <linux/types.h>
@@ -55,7 +55,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_FPU], [
 	], [
 		__kernel_fpu_begin();
 		__kernel_fpu_end();
-	], [], [$ZFS_META_LICENSE])
+	], [], [ZFS_META_LICENSE])
 
 	ZFS_LINUX_TEST_SRC([fpu_internal], [
 		#if defined(__x86_64) || defined(__x86_64__) || \
diff --git a/config/kernel.m4 b/config/kernel.m4
index 296af2cb3..002ba2eea 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -541,7 +541,9 @@ dnl #
 dnl # ZFS_LINUX_TEST_PROGRAM(C)([PROLOGUE], [BODY])
 dnl #
 m4_define([ZFS_LINUX_TEST_PROGRAM], [
+#include <linux/module.h>
 $1
+
 int
 main (void)
 {
@@ -549,6 +551,11 @@ $2
 	;
 	return 0;
 }
+
+MODULE_DESCRIPTION("conftest");
+MODULE_AUTHOR(ZFS_META_AUTHOR);
+MODULE_VERSION(ZFS_META_VERSION "-" ZFS_META_RELEASE);
+MODULE_LICENSE($3);
 ])
 
 dnl #
@@ -688,19 +695,21 @@ dnl # $3 - source
 dnl # $4 - extra cflags
 dnl # $5 - check license-compatibility
 dnl #
+dnl # Check if the test source is buildable at all and then if it is
+dnl # license compatible.
+dnl #
 dnl # N.B because all of the test cases are compiled in parallel they
 dnl # must never depend on the results of previous tests.  Each test
 dnl # needs to be entirely independent.
 dnl #
 AC_DEFUN([ZFS_LINUX_TEST_SRC], [
-	ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM([[$2]], [[$3]])], [$1])
+	ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM([[$2]], [[$3]],
+	    [["Dual BSD/GPL"]])], [$1])
 	ZFS_LINUX_CONFTEST_MAKEFILE([$1], [yes], [$4])
 
 	AS_IF([ test -n "$5" ], [
-		ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM([[
-			#include <linux/module.h>
-			MODULE_LICENSE("$5");
-			$2]], [[$3]])], [$1_license])
+		ZFS_LINUX_CONFTEST_C([ZFS_LINUX_TEST_PROGRAM(
+		    [[$2]], [[$3]], [[$5]])], [$1_license])
 		ZFS_LINUX_CONFTEST_MAKEFILE([$1_license], [yes], [$4])
 	])
 ])
@@ -790,11 +799,13 @@ dnl #
 AC_DEFUN([ZFS_LINUX_TRY_COMPILE], [
 	AS_IF([test "x$enable_linux_builtin" = "xyes"], [
 		ZFS_LINUX_COMPILE_IFELSE(
-		    [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]])],
+		    [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]],
+		    [[ZFS_META_LICENSE]])],
 		    [test -f build/conftest/conftest.o], [$3], [$4])
 	], [
 		ZFS_LINUX_COMPILE_IFELSE(
-		    [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]])],
+		    [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]],
+		    [[ZFS_META_LICENSE]])],
 		    [test -f build/conftest/conftest.ko], [$3], [$4])
 	])
 ])
@@ -860,7 +871,7 @@ dnl # provided via the fifth parameter
 dnl #
 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_HEADER], [
 	ZFS_LINUX_COMPILE_IFELSE(
-	    [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]])],
+	    [ZFS_LINUX_TEST_PROGRAM([[$1]], [[$2]], [[ZFS_META_LICENSE]])],
 	    [test -f build/conftest/conftest.ko],
 	    [$3], [$4], [$5])
 ])