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[14/17] Allow bit_waitqueue to wait on a bit in a vmalloc area

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From: Christoph Lameter <clameter@...>
To: <unlisted-recipients@...>, <@...>
Cc: <linux-fsdevel@...>, <linux-kernel@...>
Subject: [14/17] Allow bit_waitqueue to wait on a bit in a vmalloc area
Date: Tuesday, September 25, 2007 - 7:42 pm

If bit waitqueue is passed a virtual address then it must use
vmalloc_to_page instead of virt_to_page to get to the page struct.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
 kernel/wait.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6/kernel/wait.c
===================================================================
--- linux-2.6.orig/kernel/wait.c	2007-09-20 19:03:42.000000000 -0700
+++ linux-2.6/kernel/wait.c	2007-09-20 19:07:42.000000000 -0700
@@ -245,7 +245,7 @@ EXPORT_SYMBOL(wake_up_bit);
 fastcall wait_queue_head_t *bit_waitqueue(void *word, int bit)
 {
 	const int shift = BITS_PER_LONG == 32 ? 5 : 6;
-	const struct zone *zone = page_zone(virt_to_page(word));
+	const struct zone *zone = page_zone(addr_to_page(word));
 	unsigned long val = (unsigned long)word << shift | bit;
 
 	return &zone->wait_table[hash_long(val, zone->wait_table_bits)];

-- 
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[14/17] Allow bit_waitqueue to wait on a bit in a vmalloc area, Christoph Lameter, (Tue Sep 25, 7:42 pm)