alloc_percpu: Use __get_cpu_ptr in fs/xfs Impact: slight efficiency improvement on some archs. Let's use get_cpu_ptr now, rather than per_cpu_ptr(..., smp_processor_id()). Signed-off-by: Rusty Russell Cc: Tim Shimmin Cc: xfs@oss.sgi.com --- fs/xfs/xfs_mount.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -2317,12 +2317,11 @@ xfs_icsb_modify_counters( { xfs_icsb_cnts_t *icsbp; long long lcounter; /* long counter for 64 bit fields */ - int cpu, ret = 0; + int ret = 0; might_sleep(); again: - cpu = get_cpu(); - icsbp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, cpu); + icsbp = (xfs_icsb_cnts_t *)get_cpu_ptr(mp->m_sb_cnts); /* * if the counter is disabled, go to slow path @@ -2370,7 +2369,7 @@ again: return 0; slow_path: - put_cpu(); + put_cpu_ptr(); /* * serialise with a mutex so we don't burn lots of cpu on @@ -2418,7 +2417,7 @@ slow_path: balance_counter: xfs_icsb_unlock_cntr(icsbp); - put_cpu(); + put_cpu_ptr(mp->m_sb_cnts); /* * We may have multiple threads here if multiple per-cpu