From 6f0419e06a3b151ab616a31accdabef41dc2d1b0 Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Fri, 23 Jun 2006 02:03:00 -0700 Subject: [PATCH] for_each_possible_cpu: xfs for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. in xfs. Signed-off-by: KAMEZAWA Hiroyuki Acked-by: Nathan Scott Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/xfs/linux-2.6/xfs_stats.c | 4 ++-- fs/xfs/linux-2.6/xfs_sysctl.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'fs/xfs') diff --git a/fs/xfs/linux-2.6/xfs_stats.c b/fs/xfs/linux-2.6/xfs_stats.c index 1f0589a05eca..e480b6102051 100644 --- a/fs/xfs/linux-2.6/xfs_stats.c +++ b/fs/xfs/linux-2.6/xfs_stats.c @@ -62,7 +62,7 @@ xfs_read_xfsstats( while (j < xstats[i].endpoint) { val = 0; /* sum over all cpus */ - for_each_cpu(c) + for_each_possible_cpu(c) val += *(((__u32*)&per_cpu(xfsstats, c) + j)); len += sprintf(buffer + len, " %u", val); j++; @@ -70,7 +70,7 @@ xfs_read_xfsstats( buffer[len++] = '\n'; } /* extra precision counters */ - for_each_cpu(i) { + for_each_possible_cpu(i) { xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes; xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes; xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes; diff --git a/fs/xfs/linux-2.6/xfs_sysctl.c b/fs/xfs/linux-2.6/xfs_sysctl.c index 4af97682bec8..af246532fbfb 100644 --- a/fs/xfs/linux-2.6/xfs_sysctl.c +++ b/fs/xfs/linux-2.6/xfs_sysctl.c @@ -38,7 +38,7 @@ xfs_stats_clear_proc_handler( if (!ret && write && *valp) { printk("XFS Clearing xfsstats\n"); - for_each_cpu(c) { + for_each_possible_cpu(c) { preempt_disable(); /* save vn_active, it's a universal truth! */ vn_active = per_cpu(xfsstats, c).vn_active; -- cgit v1.2.3