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authorLukas Bulwahn <lukas.bulwahn@gmail.com>2022-03-23 16:07:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-23 19:00:35 -0700
commit92333baaceb399c7878c7f868a0746d7d22f9b77 (patch)
tree36d313672ce2988b8237b899dd06b35d4c1ad19b /kernel/taskstats.c
parente7ce7500375a63348e1d3a703c8d5003cbe3fea6 (diff)
downloadlinux-92333baaceb399c7878c7f868a0746d7d22f9b77.tar.bz2
taskstats: remove unneeded dead assignment
make clang-analyzer on x86_64 defconfig caught my attention with: kernel/taskstats.c:120:2: warning: Value stored to 'rc' is never read \ [clang-analyzer-deadcode.DeadStores] rc = 0; ^ Commit d94a041519f3 ("taskstats: free skb, avoid returns in send_cpu_listeners") made send_cpu_listeners() not return a value and hence, the rc variable remained only to be used within the loop where it is always assigned before read and it does not need any other initialisation. So, simply remove this unneeded dead initializing assignment. As compilers will detect this unneeded assignment and optimize this anyway, the resulting object code is identical before and after this change. No functional change. No change to object code. [akpm@linux-foundation.org: reduce scope of `rc'] Link: https://lkml.kernel.org/r/20220307093942.21310-1-lukas.bulwahn@gmail.com Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Tom Rix <trix@redhat.com> Cc: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/taskstats.c')
-rw-r--r--kernel/taskstats.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 2b4898b4752e..bcac5a9043aa 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -113,13 +113,14 @@ static void send_cpu_listeners(struct sk_buff *skb,
struct listener *s, *tmp;
struct sk_buff *skb_next, *skb_cur = skb;
void *reply = genlmsg_data(genlhdr);
- int rc, delcount = 0;
+ int delcount = 0;
genlmsg_end(skb, reply);
- rc = 0;
down_read(&listeners->sem);
list_for_each_entry(s, &listeners->list, list) {
+ int rc;
+
skb_next = NULL;
if (!list_is_last(&s->list, &listeners->list)) {
skb_next = skb_clone(skb_cur, GFP_KERNEL);