diff options
| author | Wanpeng Li <liwp@linux.vnet.ibm.com> | 2012-07-31 16:41:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 18:42:40 -0700 |
| commit | 3965c9ae47d64aadf6f13b6fcd37767b83c0689a (patch) | |
| tree | 9896fbd841edbaa8e374b593ad0f7b96191cda5d /include | |
| parent | deaf386ee58d5336bbef8959bf304573afb67c20 (diff) | |
| download | linux-3965c9ae47d64aadf6f13b6fcd37767b83c0689a.tar.bz2 | |
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/backing-dev.h | 3 | ||||
| -rw-r--r-- | include/linux/writeback.h | 5 |
2 files changed, 3 insertions, 5 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 489de625cd25..c97c6b9cd38e 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -17,6 +17,7 @@ #include <linux/timer.h> #include <linux/writeback.h> #include <linux/atomic.h> +#include <linux/sysctl.h> struct page; struct device; @@ -304,6 +305,8 @@ void clear_bdi_congested(struct backing_dev_info *bdi, int sync); void set_bdi_congested(struct backing_dev_info *bdi, int sync); long congestion_wait(int sync, long timeout); long wait_iff_congested(struct zone *zone, int sync, long timeout); +int pdflush_proc_obsolete(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos); static inline bool bdi_cap_writeback_dirty(struct backing_dev_info *bdi) { diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 6d0a0fcd80e7..c66fe3332d83 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -189,9 +189,4 @@ void tag_pages_for_writeback(struct address_space *mapping, void account_page_redirty(struct page *page); -/* pdflush.c */ -extern int nr_pdflush_threads; /* Global so it can be exported to sysctl - read-only. */ - - #endif /* WRITEBACK_H */ |