From: Wanpeng Li <liwp@linux.vnet.ibm.com>
Date: Tue, 31 Jul 2012 23:41:52 +0000 (-0700)
Subject: mm: prepare for removal of obsolete /proc/sys/vm/nr_pdflush_threads
X-Git-Tag: v3.6-rc1~24^2~107
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3965c9ae47d64aadf6f13b6fcd37767b83c0689a;p=pandora-kernel.git

mm: prepare for removal of obsolete /proc/sys/vm/nr_pdflush_threads

Since per-BDI flusher threads were introduced in 2.6, the pdflush
mechanism is not used any more.  But the old interface exported through
/proc/sys/vm/nr_pdflush_threads still exists and is obviously useless.

For back-compatibility, printk warning information and return 2 to notify
the users that the interface is removed.

Signed-off-by: Wanpeng Li <liwp@linux.vnet.ibm.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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