s390: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: linux-s390@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index d374f9b..0ebf08c 100644 (file)
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -1056,12 +1056,6 @@ int debug_register_view(debug_info_t *id, struct debug_view *view)
                mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
        pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,
                                  id, &debug_file_ops);
-       if (!pde) {
-               pr_err("Registering view %s/%s failed due to out of "
-                      "memory\n", id->name, view->name);
-               rc = -1;
-               goto out;
-       }
        spin_lock_irqsave(&id->lock, flags);
        for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
                if (!id->views[i])

diff --git a/arch/s390/kernel/kdebugfs.c b/arch/s390/kernel/kdebugfs.c
index 2c46bd6..33130c7 100644 (file)
--- a/arch/s390/kernel/kdebugfs.c
+++ b/arch/s390/kernel/kdebugfs.c
@@ -9,8 +9,6 @@ EXPORT_SYMBOL(arch_debugfs_dir);
 static int __init arch_kdebugfs_init(void)
 {
        arch_debugfs_dir = debugfs_create_dir("s390", NULL);
-       if (IS_ERR(arch_debugfs_dir))
-               arch_debugfs_dir = NULL;
        return 0;
 }
 postcore_initcall(arch_kdebugfs_init);

diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
index 12f80d1..2ac3c9b 100644 (file)
--- a/arch/s390/kernel/sysinfo.c
+++ b/arch/s390/kernel/sysinfo.c
@@ -545,8 +545,6 @@ static __init int stsi_init_debugfs(void)
        int lvl, i;
 
        stsi_root = debugfs_create_dir("stsi", arch_debugfs_dir);
-       if (IS_ERR_OR_NULL(stsi_root))
-               return 0;
        lvl = stsi(NULL, 0, 0, 0);
        if (lvl > 0)
                stsi_0_0_0 = lvl;