diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-21 13:35:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-21 13:35:10 -0800 |
| commit | cfd74486eace27a0899b30529d01bc1a09a5b973 (patch) | |
| tree | b4bb52cf16203b78f1a102567915911f0d1c4b85 | |
| parent | a1d3f5b70d13b7035f925de1f2ba0003a04b9ac5 (diff) | |
| parent | 8e1b4cf2108488ccfb9a3e7ed7cd85a435e01d4b (diff) | |
Merge branch 'stable/bug-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen: p2m: correctly initialize partial p2m leaf
xen: fix non-ANSI function warning in irq.c
| -rw-r--r-- | arch/x86/xen/irq.c | 2 | ||||
| -rw-r--r-- | arch/x86/xen/p2m.c | 20 |
2 files changed, 20 insertions, 2 deletions
diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c index 9d30105a0c4a..6a6fe8939645 100644 --- a/arch/x86/xen/irq.c +++ b/arch/x86/xen/irq.c @@ -126,7 +126,7 @@ static const struct pv_irq_ops xen_irq_ops __initdata = { #endif }; -void __init xen_init_irq_ops() +void __init xen_init_irq_ops(void) { pv_irq_ops = xen_irq_ops; x86_init.irqs.intr_init = xen_init_IRQ; diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index 8f2251d2a3f8..ddc81a06edb9 100644 --- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -237,7 +237,25 @@ void __init xen_build_dynamic_phys_to_machine(void) p2m_top[topidx] = mid; } - p2m_top[topidx][mididx] = &mfn_list[pfn]; + /* + * As long as the mfn_list has enough entries to completely + * fill a p2m page, pointing into the array is ok. But if + * not the entries beyond the last pfn will be undefined. + * And guessing that the 'what-ever-there-is' does not take it + * too kindly when changing it to invalid markers, a new page + * is allocated, initialized and filled with the valid part. + */ + if (unlikely(pfn + P2M_PER_PAGE > max_pfn)) { + unsigned long p2midx; + unsigned long *p2m = extend_brk(PAGE_SIZE, PAGE_SIZE); + p2m_init(p2m); + + for (p2midx = 0; pfn + p2midx < max_pfn; p2midx++) { + p2m[p2midx] = mfn_list[pfn + p2midx]; + } + p2m_top[topidx][mididx] = p2m; + } else + p2m_top[topidx][mididx] = &mfn_list[pfn]; } m2p_override_init(); |