[patch 04/33] xen: paravirt: unstatic leave_mm

Jeremy Fitzhardinge
2007-05-22T15:19:22Z

[-- Attachment #1: paravirt-unstatic-leave_mm.patch --]
[-- Type: text/plain, Size: 1478 bytes --]

Make globally leave_mm visible, specifically so that Xen can use it to
shoot-down lazy uses of cr3.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

---
arch/i386/kernel/smp.c | 5 +++--
include/asm-i386/mmu_context.h | 2 ++
2 files changed, 5 insertions(+), 2 deletions(-)

===================================================================
--- a/include/asm-i386/mmu_context.h
+++ b/include/asm-i386/mmu_context.h
@@ -31,6 +31,8 @@ static inline void enter_lazy_tlb(struct
per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_LAZY;
#endif
}
+
+void leave_mm (unsigned long cpu);

static inline void switch_mm(struct mm_struct *prev,
struct mm_struct *next,
===================================================================
--- a/arch/i386/kernel/smp.c
+++ b/arch/i386/kernel/smp.c
@@ -22,6 +22,7 @@

#include <asm/mtrr.h>
#include <asm/tlbflush.h>
+#include <asm/mmu_context.h>
#include <mach_apic.h>

/*
@@ -249,13 +250,13 @@ static DEFINE_SPINLOCK(tlbstate_lock);
static DEFINE_SPINLOCK(tlbstate_lock);

/*
- * We cannot call mmdrop() because we are in interrupt context,
+ * We cannot call mmdrop() because we are in interrupt context,
* instead update mm->cpu_vm_mask.
*
* We need to reload %cr3 since the page tables may be going
* away from under us..
*/
-static inline void leave_mm (unsigned long cpu)
+void leave_mm (unsigned long cpu)
{
if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
BUG();

--