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authorMatthew Wilcox <matthew@wil.cx>2007-12-06 11:18:49 -0500
committerMatthew Wilcox <willy@linux.intel.com>2007-12-06 17:35:41 -0500
commit2687a3569e40b1302f96698bcd6329aeb0ce3dd2 (patch)
tree7bb5e1ffd807ef94b145f6829bf4326a98b8fd99 /mm/filemap.c
parentf776d12dd16da1b0cd55a1240002c1b31f315d5d (diff)
downloadconfigs-2687a3569e40b1302f96698bcd6329aeb0ce3dd2.tar.gz
Add lock_page_killable
This routine is like lock_page, but can be interrupted by a fatal signal Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Diffstat (limited to 'mm/filemap.c')
-rw-r--r--mm/filemap.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 188cf5fd3e8..ac8f690d288 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -173,6 +173,12 @@ static int sync_page(void *word)
return 0;
}
+static int sync_page_killable(void *word)
+{
+ sync_page(word);
+ return fatal_signal_pending(current) ? -EINTR : 0;
+}
+
/**
* __filemap_fdatawrite_range - start writeback on mapping dirty pages in range
* @mapping: address space structure to write
@@ -577,6 +583,14 @@ void fastcall __lock_page(struct page *page)
}
EXPORT_SYMBOL(__lock_page);
+int fastcall __lock_page_killable(struct page *page)
+{
+ DEFINE_WAIT_BIT(wait, &page->flags, PG_locked);
+
+ return __wait_on_bit_lock(page_waitqueue(page), &wait,
+ sync_page_killable, TASK_KILLABLE);
+}
+
/*
* Variant of lock_page that does not require the caller to hold a reference
* on the page's mapping.