The patch titled
{slub, slob}: use unlikely() for kfree(ZERO_OR_NULL_PTR) check
has been removed from the -mm tree. Its filename was
slub-slob-use-unlikely-for-kfreezero_or_null_ptr-check.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: {slub, slob}: use unlikely() for kfree(ZERO_OR_NULL_PTR) check
From: Satyam Sharma <satyam@xxxxxxxxxxxxx>
Considering kfree(NULL) would normally occur only in error paths and
kfree(ZERO_SIZE_PTR) is uncommon as well, so let's use unlikely() for the
condition check in SLUB's and SLOB's kfree() to optimize for the common
case. SLAB has this already.
Signed-off-by: Satyam Sharma <satyam@xxxxxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slob.c | 6 +++---
mm/slub.c | 8 ++++----
2 files changed, 7 insertions(+), 7 deletions(-)
diff -puN mm/slob.c~slub-slob-use-unlikely-for-kfreezero_or_null_ptr-check mm/slob.c
--- a/mm/slob.c~slub-slob-use-unlikely-for-kfreezero_or_null_ptr-check
+++ a/mm/slob.c
@@ -360,7 +360,7 @@ static void slob_free(void *block, int s
slobidx_t units;
unsigned long flags;
- if (ZERO_OR_NULL_PTR(block))
+ if (unlikely(ZERO_OR_NULL_PTR(block)))
return;
BUG_ON(!size);
@@ -466,7 +466,7 @@ void kfree(const void *block)
{
struct slob_page *sp;
- if (ZERO_OR_NULL_PTR(block))
+ if (unlikely(ZERO_OR_NULL_PTR(block)))
return;
sp = (struct slob_page *)virt_to_page(block);
@@ -484,7 +484,7 @@ size_t ksize(const void *block)
{
struct slob_page *sp;
- if (ZERO_OR_NULL_PTR(block))
+ if (unlikely(ZERO_OR_NULL_PTR(block)))
return 0;
sp = (struct slob_page *)virt_to_page(block);
diff -puN mm/slub.c~slub-slob-use-unlikely-for-kfreezero_or_null_ptr-check mm/slub.c
--- a/mm/slub.c~slub-slob-use-unlikely-for-kfreezero_or_null_ptr-check
+++ a/mm/slub.c
@@ -2449,7 +2449,7 @@ size_t ksize(const void *object)
struct page *page;
struct kmem_cache *s;
- if (ZERO_OR_NULL_PTR(object))
+ if (unlikely(ZERO_OR_NULL_PTR(object)))
return 0;
page = get_object_page(object);
@@ -2483,7 +2483,7 @@ void kfree(const void *x)
{
struct page *page;
- if (ZERO_OR_NULL_PTR(x))
+ if (unlikely(ZERO_OR_NULL_PTR(x)))
return;
page = virt_to_head_page(x);
@@ -2800,7 +2800,7 @@ void *__kmalloc_track_caller(size_t size
get_order(size));
s = get_slab(size, gfpflags);
- if (ZERO_OR_NULL_PTR(s))
+ if (unlikely(ZERO_OR_NULL_PTR(s)))
return s;
return slab_alloc(s, gfpflags, -1, caller);
@@ -2816,7 +2816,7 @@ void *__kmalloc_node_track_caller(size_t
get_order(size));
s = get_slab(size, gfpflags);
- if (ZERO_OR_NULL_PTR(s))
+ if (unlikely(ZERO_OR_NULL_PTR(s)))
return s;
return slab_alloc(s, gfpflags, node, caller);
_
Patches currently in -mm which might be from satyam@xxxxxxxxxxxxx are
origin.patch
git-ieee1394.patch
git-watchdog.patch
intel_cacheinfo-misc-section-annotation-fixes.patch
intel_cacheinfo-call-cache_add_dev-from-cache_sysfs_init.patch
softlockup-improve-debug-output-fix.patch
argv_split-allow-argv_split-to-handle-null-pointer-in-argcp-parameter-gracefully.patch
ufs-fix-sun-state-fix-mount-check-in-ufs_fill_super.patch
i2o-fix-defined-but-not-used-build-warnings.patch
i2o-fix-defined-but-not-used-build-warnings-fix.patch
make-the-pr_-family-of-macros-in-kernelh-complete.patch
unify-dma_bit_mask-definitions-v31.patch
redefine-unregister_hotcpu_notifier-hotplug_cpu-stubs.patch
x86-msr-driver-misc-cpuinit-annotations.patch
-
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