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| author | Srikar Dronamraju <srikar@linux.vnet.ibm.com> | 2020-06-29 13:37:01 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-15 04:07:19 +0300 |
| commit | 5658cf085ba3c3f3c24ac0f7210f0473794df506 (patch) | |
| tree | 1ef6206d99d173d3bc6c6072a96ed22fdd677095 /arch/powerpc/kernel/cacheinfo.c | |
| parent | 87db7579ebd5ded337056eb765542eb2608f16e3 (diff) | |
| download | linux-5658cf085ba3c3f3c24ac0f7210f0473794df506.tar.xz | |
powerpc/cacheinfo: Use cpumap_print to print cpumap
Tejun Heo had modified shared_cpu_map_show() to use scnprintf instead
of cpumap_print during support for *pb[l] format. Refer commit
0c118b7bd09a ("powerpc: use %*pb[l] to print bitmaps including
cpumasks and nodemasks").
cpumap_print_to_pagebuf() is a standard function to print cpumap. With
commit 9cf79d115f0d ("bitmap: remove explicit newline handling using
scnprintf format string"), there is no need to print explicit newline
and trailing null character. cpumap_print_to_pagebuf() internally uses
scnprintf(). Hence replace scnprintf() with cpumap_print_to_pagebuf().
Note: shared_cpu_map_show() in drivers/base/cacheinfo.c already uses
cpumap_print_to_pagebuf().
Before this patch:
# cat /sys/devices/system/cpu0/cache/index1/shared_cpu_map
00ff
#
(Notice the extra blank line).
After this patch:
# cat /sys/devices/system/cpu0/cache/index1/shared_cpu_map
00ff
#
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200629103703.4538-2-srikar@linux.vnet.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/cacheinfo.c')
| -rw-r--r-- | arch/powerpc/kernel/cacheinfo.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c index 470336277c67..0d3c45e2fccd 100644 --- a/arch/powerpc/kernel/cacheinfo.c +++ b/arch/powerpc/kernel/cacheinfo.c @@ -652,7 +652,7 @@ static ssize_t shared_cpu_map_show(struct kobject *k, struct kobj_attribute *att struct cache_index_dir *index; struct cache *cache; const struct cpumask *mask; - int ret, cpu; + int cpu; index = kobj_to_cache_index_dir(k); cache = index->cache; @@ -664,11 +664,7 @@ static ssize_t shared_cpu_map_show(struct kobject *k, struct kobj_attribute *att mask = &cache->shared_cpu_map; } - ret = scnprintf(buf, PAGE_SIZE - 1, "%*pb\n", - cpumask_pr_args(mask)); - buf[ret++] = '\n'; - buf[ret] = '\0'; - return ret; + return cpumap_print_to_pagebuf(false, buf, mask); } static struct kobj_attribute cache_shared_cpu_map_attr = |