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authorLinus Torvalds <torvalds@linux-foundation.org>2014-03-14 18:07:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-03-14 18:07:51 -0700
commita4ecdf82f8ea49f7d3a072121dcbd0bf3a7cb93a (patch)
treeb6e3ae76d485294631c4ac2777956ae1116f455a
parentcee152ff8a3c8aedf7b97417889f9319a7002141 (diff)
parent847d7970defb45540735b3fb4e88471c27cacd85 (diff)
downloadlinux-stericsson-a4ecdf82f8ea49f7d3a072121dcbd0bf3a7cb93a.tar.gz
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Peter Anvin: "Two x86 fixes: Suresh's eager FPU fix, and a fix to the NUMA quirk for AMD northbridges. This only includes Suresh's fix patch, not the "mostly a cleanup" patch which had __init issues" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/amd/numa: Fix northbridge quirk to assign correct NUMA node x86, fpu: Check tsk_used_math() in kernel_fpu_end() for eager FPU
-rw-r--r--arch/x86/kernel/i387.c15
-rw-r--r--arch/x86/kernel/quirks.c2
2 files changed, 13 insertions, 4 deletions
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index e8368c6dd2a2..d5dd80814419 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -86,10 +86,19 @@ EXPORT_SYMBOL(__kernel_fpu_begin);
void __kernel_fpu_end(void)
{
- if (use_eager_fpu())
- math_state_restore();
- else
+ if (use_eager_fpu()) {
+ /*
+ * For eager fpu, most the time, tsk_used_math() is true.
+ * Restore the user math as we are done with the kernel usage.
+ * At few instances during thread exit, signal handling etc,
+ * tsk_used_math() is false. Those few places will take proper
+ * actions, so we don't need to restore the math here.
+ */
+ if (likely(tsk_used_math(current)))
+ math_state_restore();
+ } else {
stts();
+ }
}
EXPORT_SYMBOL(__kernel_fpu_end);
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index 7c6acd4b8995..ff898bbf579d 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -529,7 +529,7 @@ static void quirk_amd_nb_node(struct pci_dev *dev)
return;
pci_read_config_dword(nb_ht, 0x60, &val);
- node = val & 7;
+ node = pcibus_to_node(dev->bus) | (val & 7);
/*
* Some hardware may return an invalid node ID,
* so check it first: