x86/apic/uv: Silence a shift wrapping warning
authorDan Carpenter <dan.carpenter@oracle.com>
Wed, 23 Nov 2016 22:19:08 +0000 (01:19 +0300)
committerIngo Molnar <mingo@kernel.org>
Thu, 24 Nov 2016 05:01:05 +0000 (06:01 +0100)
commitc4597fd756836a5fb7900f2091797ab564390ad0
tree429d2032dfe8b5dc28f8e3d5b1963bbbe4347fa4
parent7b2dd3682896bcf1abbbbe870885728db2832a3c
x86/apic/uv: Silence a shift wrapping warning

'm_io' is stored in 6 bits so it's a number in the 0-63 range.  Static
analysis tools complain that 1 << 63 will wrap so I have changed it to
1ULL << m_io.

This code is over three years old so presumably the bug doesn't happen
very frequently in real life or someone would have complained by now.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Travis <travis@sgi.com>
Cc: Nathan Zimmer <nzimmer@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-janitors@vger.kernel.org
Fixes: b15cc4a12bed ("x86, uv, uv3: Update x2apic Support for SGI UV3")
Link: http://lkml.kernel.org/r/20161123221908.GA23997@mwanda
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/apic/x2apic_uv_x.c