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authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-02-18 10:05:19 +0300
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-03-30 10:35:38 +0400
commitb8bcfe997e46150fedcc3f5b26b846400122fdd9 (patch)
tree435f1bdfa3317e13ddcd3b87176602b597639c1b /arch/x86/mm/pageattr.c
parenta8a93f3f03b7a8008d720e8d91798efe599d416c (diff)
downloadlinux-b8bcfe997e46150fedcc3f5b26b846400122fdd9.tar.xz
x86/paravirt: remove lazy mode in interrupts
Impact: simplification, robustness Make paravirt_lazy_mode() always return PARAVIRT_LAZY_NONE when in an interrupt. This prevents interrupt code from accidentally inheriting an outer lazy state, and instead does everything synchronously. Outer batched operations are left deferred. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm/pageattr.c')
-rw-r--r--arch/x86/mm/pageattr.c14
1 files changed, 0 insertions, 14 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 9c4294986af7..9015e5e412b5 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -824,13 +824,6 @@ static int change_page_attr_set_clr(unsigned long *addr, int numpages,
vm_unmap_aliases();
- /*
- * If we're called with lazy mmu updates enabled, the
- * in-memory pte state may be stale. Flush pending updates to
- * bring them up to date.
- */
- arch_flush_lazy_mmu_mode();
-
cpa.vaddr = addr;
cpa.numpages = numpages;
cpa.mask_set = mask_set;
@@ -873,13 +866,6 @@ static int change_page_attr_set_clr(unsigned long *addr, int numpages,
} else
cpa_flush_all(cache);
- /*
- * If we've been called with lazy mmu updates enabled, then
- * make sure that everything gets flushed out before we
- * return.
- */
- arch_flush_lazy_mmu_mode();
-
out:
return ret;
}