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From:   Arnd Bergmann <arnd@arndb.de>
To:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
        x86@kernel.org, Mike Travis <mike.travis@hpe.com>,
        Steve Wahl <steve.wahl@hpe.com>,
        Dimitri Sivanich <dimitri.sivanich@hpe.com>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Christoph Hellwig <hch@infradead.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Hedi Berriche <hedi.berriche@hpe.com>,
        Justin Ernst <justin.ernst@hpe.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Russ Anderson <russ.anderson@hpe.com>,
        Anshuman Khandual <anshuman.khandual@arm.com>,
        linux-kernel@vger.kernel.org
Subject: [PATCH] x86/platform/uv: avoid unused variable warning
Date:   Thu, 12 Dec 2019 14:58:06 +0100
Message-Id: <20191212135815.4176658-1-arnd@arndb.de>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

When CONFIG_PROC_FS is disabled, the compiler warns about an
unused variable:

arch/x86/kernel/apic/x2apic_uv_x.c: In function 'uv_setup_proc_files':
arch/x86/kernel/apic/x2apic_uv_x.c:1546:8: error: unused variable 'name' [-Werror=unused-variable]
  char *name = hubless ? "hubless" : "hubbed";

Simplify the code so this variable is no longer needed.

Fixes: 8785968bce1c ("x86/platform/uv: Add UV Hubbed/Hubless Proc FS Files")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/x86/kernel/apic/x2apic_uv_x.c | 28 ++++------------------------
 1 file changed, 4 insertions(+), 24 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index d5b51a740524..1af416da1f87 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -1493,13 +1493,13 @@ static void check_efi_reboot(void)
 }
 
 /* Setup user proc fs files */
-static int proc_hubbed_show(struct seq_file *file, void *data)
+static int __maybe_unused proc_hubbed_show(struct seq_file *file, void *data)
 {
 	seq_printf(file, "0x%x\n", uv_hubbed_system);
 	return 0;
 }
 
-static int proc_hubless_show(struct seq_file *file, void *data)
+static int __maybe_unused proc_hubless_show(struct seq_file *file, void *data)
 {
 	seq_printf(file, "0x%x\n", uv_hubless_system);
 	return 0;
@@ -1511,28 +1511,11 @@ static int proc_oemid_show(struct seq_file *file, void *data)
 	return 0;
 }
 
-static int proc_hubbed_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, proc_hubbed_show, (void *)NULL);
-}
-
-static int proc_hubless_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, proc_hubless_show, (void *)NULL);
-}
-
 static int proc_oemid_open(struct inode *inode, struct file *file)
 {
 	return single_open(file, proc_oemid_show, (void *)NULL);
 }
 
-/* (struct is "non-const" as open function is set at runtime) */
-static struct file_operations proc_version_fops = {
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
 static const struct file_operations proc_oemid_fops = {
 	.open		= proc_oemid_open,
 	.read		= seq_read,
@@ -1543,15 +1526,12 @@ static const struct file_operations proc_oemid_fops = {
 static __init void uv_setup_proc_files(int hubless)
 {
 	struct proc_dir_entry *pde;
-	char *name = hubless ? "hubless" : "hubbed";
 
 	pde = proc_mkdir(UV_PROC_NODE, NULL);
-	proc_create("oemid", 0, pde, &proc_oemid_fops);
-	proc_create(name, 0, pde, &proc_version_fops);
 	if (hubless)
-		proc_version_fops.open = proc_hubless_open;
+		proc_create_single("hubless", 0, pde, proc_hubless_show);
 	else
-		proc_version_fops.open = proc_hubbed_open;
+		proc_create_single("hubbed", 0, pde, proc_hubbed_show);
 }
 
 /* Initialize UV hubless systems */
-- 
2.20.0