The patch titled
dmapools: protect page_list walk in show_pools()
has been added to the -mm tree. Its filename is
dmapools-protect-page_list-walk-in-show_pools.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: dmapools: protect page_list walk in show_pools()
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
show_pools() walks the page_list of a pool w/o protection against the list
modifications in alloc/free. Take pool->lock to avoid stomping into
nirvana.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/dmapool.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN mm/dmapool.c~dmapools-protect-page_list-walk-in-show_pools mm/dmapool.c
--- a/mm/dmapool.c~dmapools-protect-page_list-walk-in-show_pools
+++ a/mm/dmapool.c
@@ -86,10 +86,12 @@ show_pools(struct device *dev, struct de
unsigned pages = 0;
unsigned blocks = 0;
+ spin_lock_irq(&pool->lock);
list_for_each_entry(page, &pool->page_list, page_list) {
pages++;
blocks += page->in_use;
}
+ spin_unlock_irq(&pool->lock);
/* per-pool info, no real statistics yet */
temp = scnprintf(next, size, "%-16s %4u %4Zu %4Zu %2u\n",
_
Patches currently in -mm which might be from tglx@xxxxxxxxxxxxx are
origin.patch
linux-next.patch
kernel-core-add-smp_call_function_any.patch
arch-x86-kernel-cpu-cpufreq-acpi-cpufreqc-avoid-cross-cpu-interrupts-by-using-smp_call_function_any.patch
parisc-remove-obsolete-hw_interrupt_type.patch
genirq-do-not-disable-irq_wakeup-marked-irqs-on-suspend.patch
dmapools-protect-page_list-walk-in-show_pools.patch
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