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[tip:x86/platform] x86/platform/UV: Ensure uv_system_init is called when necessary

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  [tip:x86/platform] x86/platform/UV: Ensure uv_system_init is called  when necessary "tip-bot for travis@sgi.com" <tipbot@zytor.com> - 2017-02-01 11:20 +0100

#1571454 — [tip:x86/platform] x86/platform/UV: Ensure uv_system_init is called when necessary

Commit-ID:  9ec808a0225aabab59fb2932b70784b087ac0f58
Gitweb:     http://git.kernel.org/tip/9ec808a0225aabab59fb2932b70784b087ac0f58
Author:     travis@sgi.com <travis@sgi.com>
AuthorDate: Wed, 25 Jan 2017 10:35:23 -0600
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 1 Feb 2017 10:21:00 +0100

x86/platform/UV: Ensure uv_system_init is called when necessary

Move the check to whether this is a UV system that needs initialization
from is_uv_system() to the internal uv_system_init() function.  This is
because on a UV system without a HUB the is_uv_system() returns false.
But we still need some specific UV system initialization.  See the
uv_system_init() for change to a quick check if UV is applicable. This
change should not increase overhead since is_uv_system() also called
into this same area.

Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Russ Anderson <rja@hpe.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Dimitri Sivanich <sivanich@hpe.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170125163518.256403963@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/smpboot.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 46732dc..386c7f7 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1341,8 +1341,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
 	pr_info("CPU0: ");
 	print_cpu_info(&cpu_data(0));
 
-	if (is_uv_system())
-		uv_system_init();
+	uv_system_init();
 
 	set_mtrr_aps_delayed_init();
 

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