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| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2020-03-16 14:39:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-23 11:36:33 +0300 |
| commit | 4753b111f003f3c193d6313ffcd859424cc33c14 (patch) | |
| tree | 868d357218cb9abea9ea850bd9fb30de9d934ee0 /arch/s390 | |
| parent | 380d1290460345bc69aadd3d4ca9e73b62f29cb8 (diff) | |
| download | linux-4753b111f003f3c193d6313ffcd859424cc33c14.tar.xz | |
s390/cpuinfo: fix wrong output when CPU0 is offline
[ Upstream commit 872f27103874a73783aeff2aac2b41a489f67d7c ]
/proc/cpuinfo should not print information about CPU 0 when it is offline.
Fixes: 281eaa8cb67c ("s390/cpuinfo: simplify locking and skip offline cpus early")
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
[heiko.carstens@de.ibm.com: shortened commit message]
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/processor.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index 6ebc2117c66c..91b9b3f73de6 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c @@ -165,8 +165,9 @@ static void show_cpu_mhz(struct seq_file *m, unsigned long n) static int show_cpuinfo(struct seq_file *m, void *v) { unsigned long n = (unsigned long) v - 1; + unsigned long first = cpumask_first(cpu_online_mask); - if (!n) + if (n == first) show_cpu_summary(m, v); if (!machine_has_cpu_mhz) return 0; @@ -179,6 +180,8 @@ static inline void *c_update(loff_t *pos) { if (*pos) *pos = cpumask_next(*pos - 1, cpu_online_mask); + else + *pos = cpumask_first(cpu_online_mask); return *pos < nr_cpu_ids ? (void *)*pos + 1 : NULL; } |