tree 29214ae667a58aa005d0ed13e51c265fa675adf0
parent c66de4a5be7913247bd83d79168f8e4420c9cfbc
author Peter Zijlstra <a.p.zijlstra@chello.nl> 1241538623 +0200
committer Ingo Molnar <mingo@elte.hu> 1241547511 +0200

perf_counter: add ioctl(PERF_COUNTER_IOC_RESET)

Provide a way to reset an existing counter - this eases PAPI
libraries around perfcounters.

Similar to read() it doesn't collapse pending child counters.

[ Impact: new perfcounter fd ioctl method to reset counters ]

Suggested-by: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20090505155437.022272933@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>