mm: simplify filemap_nopage

Identical block is duplicated twice: contrary to the comment, we have been
re-reading the page *twice* in filemap_nopage rather than once.

If any retry logic or anything is needed, it belongs in lower levels anyway.
Only retry once.  Linus agrees.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 24 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index 070e7547d5b5..cbea95a25283 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1446,30 +1446,6 @@ page_not_uptodate:
                 majmin = VM_FAULT_MAJOR;
                 count_vm_event(PGMAJFAULT);
         }
-        lock_page(page);
-
-        /* Did it get unhashed while we waited for it? */
-        if (!page->mapping) {
-                unlock_page(page);
-                page_cache_release(page);
-                goto retry_all;
-        }
-
-        /* Did somebody else get it up-to-date? */
-        if (PageUptodate(page)) {
-                unlock_page(page);
-                goto success;
-        }
-
-        error = mapping->a_ops->readpage(file, page);
-        if (!error) {
-                wait_on_page_locked(page);
-                if (PageUptodate(page))
-                        goto success;
-        } else if (error == AOP_TRUNCATED_PAGE) {
-                page_cache_release(page);
-                goto retry_find;
-        }
 
         /*
          * Umm, take care of errors if the page isn't up-to-date.