xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86/paravirt: remove lazy mode in interrupts

Browse Source 
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>
This commit is contained in:
Jeremy Fitzhardinge
2009-02-17 23:05:19 -08:00
parent a8a93f3f03
commit b8bcfe997e
5 changed files with 5 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/x86/mm/fault.c
View File

@@ -225,12 +225,10 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
if (!pmd_present(*pmd_k))
return NULL;
if (!pmd_present(*pmd)) {
if (!pmd_present(*pmd))
set_pmd(pmd, *pmd_k);
arch_flush_lazy_mmu_mode();
} else {
else
BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
}
return pmd_k;
}