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Subject[tip:x86/platform] x86/platform/UV: Ensure uv_system_init is called when necessary
Commit-ID:  9ec808a0225aabab59fb2932b70784b087ac0f58
Author: <>
AuthorDate: Wed, 25 Jan 2017 10:35:23 -0600
Committer: Ingo Molnar <>
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 <>
Reviewed-by: Russ Anderson <>
Acked-by: Thomas Gleixner <>
Acked-by: Dimitri Sivanich <>
Cc: Linus Torvalds <>
Cc: Peter Zijlstra <>
Signed-off-by: Ingo Molnar <>
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: ");

- if (is_uv_system())
- uv_system_init();
+ uv_system_init();


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