Linux 5.17 compat: PDE_DATA() renamed to pde_data()

Upstream commit 359745d78351c6f5442435f81549f0207ece28aa
("proc: remove PDE_DATA() completely")

Link: https://lore.kernel.org/all/20211124081956.87711-2-songmuchun@bytedance.com/T/#u
Closes: openzfs#13004
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>

config/kernel-pde-data.m4

@@ -1,20 +1,22 @@
 dnl #
-dnl # 3.10 API change,
-dnl # PDE is replaced by PDE_DATA
+dnl # 5.17 API: PDE_DATA() renamed to pde_data(),
+dnl # 359745d78351c6f5442435f81549f0207ece28aa ("proc: remove PDE_DATA() completely")
 dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_PDE_DATA], [
 	ZFS_LINUX_TEST_SRC([pde_data], [
 		#include <linux/proc_fs.h>
 	], [
-		PDE_DATA(NULL);
+		pde_data(NULL);
 	])
 ])
 
 AC_DEFUN([ZFS_AC_KERNEL_PDE_DATA], [
-	AC_MSG_CHECKING([whether PDE_DATA() is available])
-	ZFS_LINUX_TEST_RESULT_SYMBOL([pde_data], [PDE_DATA], [], [
+	AC_MSG_CHECKING([whether pde_data() is lowercase])
+	ZFS_LINUX_TEST_RESULT([pde_data], [
 		AC_MSG_RESULT(yes)
-	],[
-		ZFS_LINUX_TEST_ERROR([PDE_DATA])
+		AC_DEFINE(SPL_PDE_DATA, pde_data, [pde_data() is pde_data()])
+	], [
+		AC_MSG_RESULT(no)
+		AC_DEFINE(SPL_PDE_DATA, PDE_DATA, [pde_data() is PDE_DATA()])
 	])
 ])

module/os/linux/spl/spl-kstat.c

@@ -418,7 +418,7 @@ proc_kstat_open(struct inode *inode, struct file *filp)
 		return (rc);
 
 	f = filp->private_data;
-	f->private = PDE_DATA(inode);
+	f->private = SPL_PDE_DATA(inode);
 
 	return (0);
 }

module/os/linux/spl/spl-procfs-list.c

@@ -175,7 +175,7 @@ procfs_list_open(struct inode *inode, struct file *filp)
 
 	struct seq_file *f = filp->private_data;
 	procfs_list_cursor_t *cursor = f->private;
-	cursor->procfs_list = PDE_DATA(inode);
+	cursor->procfs_list = SPL_PDE_DATA(inode);
 	cursor->cached_node = NULL;
 	cursor->cached_pos = 0;