From f148b41e8b2e114d0aba023adf326b03368f3246 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Sun, 11 Sep 2016 14:58:21 +0900
Subject: x86: Clean up various simple wrapper functions

Remove unneeded variables and assignments.

While we are here, let's fix the following as well:

  - Remove unnecessary parentheses
  - Remove unnecessary unsigned-suffix 'U' from constant values
  - Reword the comment in set_apic_id() (suggested by Thomas Gleixner)

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andrew Banman <abanman@sgi.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Daniel J Blueman <daniel@numascale.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Mike Travis <travis@sgi.com>
Cc: Nathan Zimmer <nzimmer@sgi.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steffen Persvold <sp@numascale.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Wei Jiangang <weijg.fnst@cn.fujitsu.com>
Link: http://lkml.kernel.org/r/1473573502-27954-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/apic/apic_flat_64.c  | 16 +++-------------
 arch/x86/kernel/apic/apic_numachip.c |  5 +----
 arch/x86/kernel/apic/x2apic_uv_x.c   |  7 ++-----
 3 files changed, 6 insertions(+), 22 deletions(-)

(limited to 'arch/x86/kernel')

diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 5b2ae10..70796f5 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -116,27 +116,17 @@ static void flat_send_IPI_all(int vector)
 
 static unsigned int flat_get_apic_id(unsigned long x)
 {
-	unsigned int id;
-
-	id = (((x)>>24) & 0xFFu);
-
-	return id;
+	return (x >> 24) & 0xFF;
 }
 
 static unsigned long set_apic_id(unsigned int id)
 {
-	unsigned long x;
-
-	x = ((id & 0xFFu)<<24);
-	return x;
+	return (id & 0xFF) << 24;
 }
 
 static unsigned int read_xapic_id(void)
 {
-	unsigned int id;
-
-	id = flat_get_apic_id(apic_read(APIC_ID));
-	return id;
+	return flat_get_apic_id(apic_read(APIC_ID));
 }
 
 static int flat_apic_id_registered(void)
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index 714d4fd..e08fe2c 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -40,10 +40,7 @@ static unsigned int numachip1_get_apic_id(unsigned long x)
 
 static unsigned long numachip1_set_apic_id(unsigned int id)
 {
-	unsigned long x;
-
-	x = ((id & 0xffU) << 24);
-	return x;
+	return (id & 0xff) << 24;
 }
 
 static unsigned int numachip2_get_apic_id(unsigned long x)
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index cb0673c..0f8cd92 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -533,11 +533,8 @@ static unsigned int x2apic_get_apic_id(unsigned long x)
 
 static unsigned long set_apic_id(unsigned int id)
 {
-	unsigned long x;
-
-	/* maskout x2apic_extra_bits ? */
-	x = id;
-	return x;
+	/* CHECKME: Do we need to mask out the xapic extra bits? */
+	return id;
 }
 
 static unsigned int uv_read_apic_id(void)
-- 
cgit v1.1