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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
parentf776d12dd16da1b0cd55a1240002c1b31f315d5d (diff)
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')
-rw-r--r--mm/filemap.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 188cf5fd3e8d..ac8f690d2885 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -173,6 +173,12 @@ static int sync_page(void *word)
173 return 0; 173 return 0;
174} 174}
175 175
176static int sync_page_killable(void *word)
177{
178 sync_page(word);
179 return fatal_signal_pending(current) ? -EINTR : 0;
180}
181
176/** 182/**
177 * __filemap_fdatawrite_range - start writeback on mapping dirty pages in range 183 * __filemap_fdatawrite_range - start writeback on mapping dirty pages in range
178 * @mapping: address space structure to write 184 * @mapping: address space structure to write
@@ -577,6 +583,14 @@ void fastcall __lock_page(struct page *page)
577} 583}
578EXPORT_SYMBOL(__lock_page); 584EXPORT_SYMBOL(__lock_page);
579 585
586int fastcall __lock_page_killable(struct page *page)
587{
588 DEFINE_WAIT_BIT(wait, &page->flags, PG_locked);
589
590 return __wait_on_bit_lock(page_waitqueue(page), &wait,
591 sync_page_killable, TASK_KILLABLE);
592}
593
580/* 594/*
581 * Variant of lock_page that does not require the caller to hold a reference 595 * Variant of lock_page that does not require the caller to hold a reference
582 * on the page's mapping. 596 * on the page's mapping.