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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2025-05-12 11:27:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-27 11:07:33 +0100 |
| commit | ae79701ca10c2e98ecd6d0d8c262303b2e7865f6 (patch) | |
| tree | 985e11af3803a853579e8e108a77760f1faf7336 /net/ipv4 | |
| parent | 00a88e9ea1b170d579c56327c38f7e8cf689df87 (diff) | |
| download | linux-ae79701ca10c2e98ecd6d0d8c262303b2e7865f6.tar.gz linux-ae79701ca10c2e98ecd6d0d8c262303b2e7865f6.tar.bz2 linux-ae79701ca10c2e98ecd6d0d8c262303b2e7865f6.zip | |
ipv4/route: Use this_cpu_inc() for stats on PREEMPT_RT
[ Upstream commit 1c0829788a6e6e165846b9bedd0b908ef16260b6 ]
The statistics are incremented with raw_cpu_inc() assuming it always
happens with bottom half disabled. Without per-CPU locking in
local_bh_disable() on PREEMPT_RT this is no longer true.
Use this_cpu_inc() on PREEMPT_RT for the increment to not worry about
preemption.
Cc: David Ahern <dsahern@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20250512092736.229935-4-bigeasy@linutronix.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/route.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 4574dcba9f19..870108101017 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -192,7 +192,11 @@ const __u8 ip_tos2prio[16] = { EXPORT_SYMBOL(ip_tos2prio); static DEFINE_PER_CPU(struct rt_cache_stat, rt_cache_stat); +#ifndef CONFIG_PREEMPT_RT #define RT_CACHE_STAT_INC(field) raw_cpu_inc(rt_cache_stat.field) +#else +#define RT_CACHE_STAT_INC(field) this_cpu_inc(rt_cache_stat.field) +#endif #ifdef CONFIG_PROC_FS static void *rt_cache_seq_start(struct seq_file *seq, loff_t *pos) |