diff mbox series

wifi: mac80211: clean up assignments to pointer cache.

Message ID 20240215232151.2075483-1-colin.i.king@gmail.com (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series wifi: mac80211: clean up assignments to pointer cache. | expand

Checks

Context Check Description
netdev/series_format warning Single patches do not need cover letters; Target tree name not specified in the subject
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 989 this patch: 989
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 5 maintainers not CCed: morbo@google.com justinstitt@google.com nathan@kernel.org ndesaulniers@google.com llvm@lists.linux.dev
netdev/build_clang success Errors and warnings before: 1006 this patch: 1006
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1006 this patch: 1006
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 33 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Colin Ian King Feb. 15, 2024, 11:21 p.m. UTC 
From: Colin Ian King <colin.i.king@intel.com>

The assignment to pointer cache in function mesh_fast_tx_gc can
be made at the declaration time rather than a later assignment.
There are also 3 functions where pointer cache is being initialized
at declaration time and later re-assigned again with the same
value, these are redundant and can be removed.

Cleans up code and three clang scan build warnings:
warning: Value stored to 'cache' during its initialization is never
read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@intel.com>
---
 net/mac80211/mesh_pathtbl.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

Comments

Simon Horman Feb. 19, 2024, 4:08 p.m. UTC | #1 
On Thu, Feb 15, 2024 at 11:21:51PM +0000, Colin Ian King wrote:
> From: Colin Ian King <colin.i.king@intel.com>
> 
> The assignment to pointer cache in function mesh_fast_tx_gc can
> be made at the declaration time rather than a later assignment.
> There are also 3 functions where pointer cache is being initialized
> at declaration time and later re-assigned again with the same
> value, these are redundant and can be removed.
> 
> Cleans up code and three clang scan build warnings:
> warning: Value stored to 'cache' during its initialization is never
> read [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@intel.com>

FWIIW, these changes look fine to me although I might have split the
mesh_fast_tx_gc() and mesh_fast_tx_flush_sta() changes into different
patches as they seem to address separate issues.

That notwithstanding,

Reviewed-by: Simon Horman <horms@kernel.org>
diff mbox series

Patch

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 735edde1bd81..91b55d6a68b9 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -599,13 +599,12 @@  void mesh_fast_tx_cache(struct ieee80211_sub_if_data *sdata,
 
 void mesh_fast_tx_gc(struct ieee80211_sub_if_data *sdata)
 {
 	unsigned long timeout = msecs_to_jiffies(MESH_FAST_TX_CACHE_TIMEOUT);
-	struct mesh_tx_cache *cache;
+	struct mesh_tx_cache *cache = &sdata->u.mesh.tx_cache;
 	struct ieee80211_mesh_fast_tx *entry;
 	struct hlist_node *n;
 
-	cache = &sdata->u.mesh.tx_cache;
 	if (atomic_read(&cache->rht.nelems) < MESH_FAST_TX_CACHE_THRESHOLD_SIZE)
 		return;
 
 	spin_lock_bh(&cache->walk_lock);
@@ -621,9 +620,8 @@  void mesh_fast_tx_flush_mpath(struct mesh_path *mpath)
 	struct mesh_tx_cache *cache = &sdata->u.mesh.tx_cache;
 	struct ieee80211_mesh_fast_tx *entry;
 	struct hlist_node *n;
 
-	cache = &sdata->u.mesh.tx_cache;
 	spin_lock_bh(&cache->walk_lock);
 	hlist_for_each_entry_safe(entry, n, &cache->walk_head, walk_list)
 		if (entry->mpath == mpath)
 			mesh_fast_tx_entry_free(cache, entry);
@@ -636,9 +634,8 @@  void mesh_fast_tx_flush_sta(struct ieee80211_sub_if_data *sdata,
 	struct mesh_tx_cache *cache = &sdata->u.mesh.tx_cache;
 	struct ieee80211_mesh_fast_tx *entry;
 	struct hlist_node *n;
 
-	cache = &sdata->u.mesh.tx_cache;
 	spin_lock_bh(&cache->walk_lock);
 	hlist_for_each_entry_safe(entry, n, &cache->walk_head, walk_list)
 		if (rcu_access_pointer(entry->mpath->next_hop) == sta)
 			mesh_fast_tx_entry_free(cache, entry);
@@ -650,9 +647,8 @@  void mesh_fast_tx_flush_addr(struct ieee80211_sub_if_data *sdata,
 {
 	struct mesh_tx_cache *cache = &sdata->u.mesh.tx_cache;
 	struct ieee80211_mesh_fast_tx *entry;
 
-	cache = &sdata->u.mesh.tx_cache;
 	spin_lock_bh(&cache->walk_lock);
 	entry = rhashtable_lookup_fast(&cache->rht, addr, fast_tx_rht_params);
 	if (entry)
 		mesh_fast_tx_entry_free(cache, entry);