tree ffbac0b010d48bbf6ae6d93a905ab34a6a2245dc
parent 2cdac5f07180d5536b7f695685dd2bc49bc79e23
author Jan Beulich <JBeulich@novell.com> 1311256963 +0100
committer Greg Kroah-Hartman <gregkh@suse.de> 1312400570 -0700

FS-Cache: Fix __fscache_uncache_all_inode_pages()'s outer loop

commit b307d4655a71749ac3f91c6dbe33d28cc026ceeb upstream.

The compiler, at least for ix86 and m68k, validly warns that the
comparison:

	next <= (loff_t)-1

is always true (and it's always true also for x86-64 and probably all
other arches - as long as pgoff_t isn't wider than loff_t).  The
intention appears to be to avoid wrapping of "next", so rather than
eliminating the pointless comparison, fix the loop to indeed get exited
when "next" would otherwise wrap.

On m68k the following warning is observed:

  fs/fscache/page.c: In function '__fscache_uncache_all_inode_pages':
  fs/fscache/page.c:979: warning: comparison is always false due to limited range of data type

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reported-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Suresh Jayaraman <sjayaraman@suse.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>