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>

1 files changed, 3 insertions, 13 deletions

diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 5b2ae106bd4a..70796f51b2ff 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)