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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-02-18 08:05:19 +0100 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-03-30 08:35:38 +0200 |
| commit | b8bcfe997e46150fedcc3f5b26b846400122fdd9 (patch) | |
| tree | 435f1bdfa3317e13ddcd3b87176602b597639c1b /arch/x86/mm/pageattr.c | |
| parent | mm: disable preemption in apply_to_pte_range (diff) | |
| download | linux-b8bcfe997e46150fedcc3f5b26b846400122fdd9.tar.xz linux-b8bcfe997e46150fedcc3f5b26b846400122fdd9.zip | |
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.c | 14 |
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; } |