The patch titled
SLUB: Do not use length parameter in slab_alloc()
has been added to the -mm tree. Its filename is
slub-do-not-use-length-parameter-in-slab_alloc.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: SLUB: Do not use length parameter in slab_alloc()
From: Christoph Lameter <clameter@xxxxxxx>
We can get to the length of the object through the kmem_cache_structure. The
additional parameter does no good and causes the compiler to generate bad
code.
Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 20 +++++++++-----------
1 files changed, 9 insertions(+), 11 deletions(-)
diff -puN mm/slub.c~slub-do-not-use-length-parameter-in-slab_alloc mm/slub.c
--- a/mm/slub.c~slub-do-not-use-length-parameter-in-slab_alloc
+++ a/mm/slub.c
@@ -1551,7 +1551,7 @@ debug:
* Otherwise we can simply pick the next object from the lockless free list.
*/
static void __always_inline *slab_alloc(struct kmem_cache *s,
- gfp_t gfpflags, int node, void *addr, int length)
+ gfp_t gfpflags, int node, void *addr)
{
struct page *page;
void **object;
@@ -1571,23 +1571,21 @@ static void __always_inline *slab_alloc(
local_irq_restore(flags);
if (unlikely((gfpflags & __GFP_ZERO) && object))
- memset(object, 0, length);
+ memset(object, 0, s->objsize);
return object;
}
void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
{
- return slab_alloc(s, gfpflags, -1,
- __builtin_return_address(0), s->objsize);
+ return slab_alloc(s, gfpflags, -1, __builtin_return_address(0));
}
EXPORT_SYMBOL(kmem_cache_alloc);
#ifdef CONFIG_NUMA
void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
{
- return slab_alloc(s, gfpflags, node,
- __builtin_return_address(0), s->objsize);
+ return slab_alloc(s, gfpflags, node, __builtin_return_address(0));
}
EXPORT_SYMBOL(kmem_cache_alloc_node);
#endif
@@ -2383,7 +2381,7 @@ void *__kmalloc(size_t size, gfp_t flags
if (ZERO_OR_NULL_PTR(s))
return s;
- return slab_alloc(s, flags, -1, __builtin_return_address(0), size);
+ return slab_alloc(s, flags, -1, __builtin_return_address(0));
}
EXPORT_SYMBOL(__kmalloc);
@@ -2395,7 +2393,7 @@ void *__kmalloc_node(size_t size, gfp_t
if (ZERO_OR_NULL_PTR(s))
return s;
- return slab_alloc(s, flags, node, __builtin_return_address(0), size);
+ return slab_alloc(s, flags, node, __builtin_return_address(0));
}
EXPORT_SYMBOL(__kmalloc_node);
#endif
@@ -2736,7 +2734,7 @@ void *kmem_cache_zalloc(struct kmem_cach
{
void *x;
- x = slab_alloc(s, flags, -1, __builtin_return_address(0), 0);
+ x = slab_alloc(s, flags, -1, __builtin_return_address(0));
if (x)
memset(x, 0, s->objsize);
return x;
@@ -2786,7 +2784,7 @@ void *__kmalloc_track_caller(size_t size
if (ZERO_OR_NULL_PTR(s))
return s;
- return slab_alloc(s, gfpflags, -1, caller, size);
+ return slab_alloc(s, gfpflags, -1, caller);
}
void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
@@ -2797,7 +2795,7 @@ void *__kmalloc_node_track_caller(size_t
if (ZERO_OR_NULL_PTR(s))
return s;
- return slab_alloc(s, gfpflags, node, caller, size);
+ return slab_alloc(s, gfpflags, node, caller);
}
#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
_
Patches currently in -mm which might be from clameter@xxxxxxx are
origin.patch
slub-remove-useless-export_symbol.patch
git-ubi.patch
pa-risc-use-page-allocator-instead-of-slab-allocator.patch
pa-risc-use-page-allocator-instead-of-slab-allocator-fix.patch
usb-make-the-usb_device-numa_node-to-get-assigned-from.patch
quicklist-support-for-x86_64.patch
x86_64-get-mp_bus_to_node-as-early.patch
x86_64-get-mp_bus_to_node-as-early-fix.patch
change-zonelist-order-zonelist-order-selection-logic.patch
change-zonelist-order-zonelist-order-selection-logic-add-check_highest_zone-to-build_zonelists_in_zone_order.patch
change-zonelist-order-v6-zonelist-fix.patch
change-zonelist-order-auto-configuration.patch
change-zonelist-order-documentaion.patch
make-proc-slabinfo-use-seq_list_xxx-helpers.patch
make-proc-slabinfo-use-seq_list_xxx-helpers-fix.patch
remove-the-deprecated-kmem_cache_t-typedef-from-slabh.patch
slub-support-slub_debug-on-by-default.patch
slub-support-slub_debug-on-by-default-tidy.patch
numa-mempolicy-dynamic-interleave-map-for-system-init.patch
numa-mempolicy-trivial-debug-fixes.patch
slob-initial-numa-support.patch
mm-fixup-proc-vmstat-output.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated.patch
group-short-lived-and-reclaimable-kernel-allocations.patch
fix-calculation-in-move_freepages_block-for-counting-pages.patch
breakout-page_order-to-internalh-to-avoid-special-knowledge-of-the-buddy-allocator.patch
do-not-depend-on-max_order-when-grouping-pages-by-mobility.patch
print-out-statistics-in-relation-to-fragmentation-avoidance-to-proc-pagetypeinfo.patch
have-kswapd-keep-a-minimum-order-free-other-than-order-0.patch
have-kswapd-keep-a-minimum-order-free-other-than-order-0-fix.patch
only-check-absolute-watermarks-for-alloc_high-and-alloc_harder-allocations.patch
slub-mm-only-make-slub-the-default-slab-allocator.patch
slub-exploit-page-mobility-to-increase-allocation-order.patch
slub-reduce-antifrag-max-order.patch
slub-reduce-antifrag-max-order-use-antifrag-constant-instead-of-hardcoding-page-order.patch
slub-change-error-reporting-format-to-follow-lockdep-loosely.patch
slub-change-error-reporting-format-to-follow-lockdep-loosely-fix.patch
slub-use-list_for_each_entry-for-loops-over-all-slabs.patch
slub-slab-validation-move-tracking-information-alloc-outside-of.patch
slub-ensure-that-the-object-per-slabs-stays-low-for-high-orders.patch
slub-debug-fix-initial-object-debug-state-of-numa-bootstrap-objects.patch
slab-allocators-consolidate-code-for-krealloc-in-mm-utilc.patch
slab-allocators-consistent-zero_size_ptr-support-and-null-result-semantics.patch
slab-allocators-support-__gfp_zero-in-all-allocators.patch
slab-allocators-support-__gfp_zero-in-all-allocators-fix.patch
slub-add-some-more-inlines-and-ifdef-config_slub_debug.patch
slub-extract-dma_kmalloc_cache-from-get_cache.patch
slub-do-proper-locking-during-dma-slab-creation.patch
slub-faster-more-efficient-slab-determination-for-__kmalloc.patch
slub-faster-more-efficient-slab-determination-for-__kmalloc-fix.patch
slub-faster-more-efficient-slab-determination-for-__kmalloc-fix-2.patch
slub-simplify-dma-index-size-calculation.patch
mm-slubc-make-code-static.patch
slub-style-fix-up-the-loop-to-disable-small-slabs.patch
slub-do-not-use-length-parameter-in-slab_alloc.patch
slab-allocators-cleanup-zeroing-allocations.patch
slab-allocators-replace-explicit-zeroing-with-__gfp_zero.patch
slub-do-not-allocate-object-bit-array-on-stack.patch
slub-move-sysfs-operations-outside-of-slub_lock.patch
slub-fix-config_slub_debug-use-for-config_numa.patch
add-vm_bug_on-in-case-someone-uses-page_mapping-on-a-slab-page.patch
memory-unplug-v7-migration-by-kernel.patch
memory-unplug-v7-isolate_lru_page-fix.patch
define-config_bounce-to-avoid-useless-inclusion-of-bounce-buffer.patch
dma-make-dma-pool-to-use-kmalloc_node.patch
revoke-core-code.patch
intel-iommu-dmar-detection-and-parsing-logic.patch
intel-iommu-pci-generic-helper-function.patch
intel-iommu-pci-generic-helper-function-fix.patch
intel-iommu-clflush_cache_range-now-takes-size-param.patch
intel-iommu-iova-allocation-and-management-routines.patch
intel-iommu-iova-allocation-and-management-routines-fix.patch
intel-iommu-intel-iommu-driver.patch
intel-iommu-intel-iommu-driver-fix.patch
intel-iommu-intel-iommu-driver-fix-2.patch
intel-iommu-avoid-memory-allocation-failures-in-dma-map-api-calls.patch
intel-iommu-intel-iommu-cmdline-option-forcedac.patch
intel-iommu-dmar-fault-handling-support.patch
intel-iommu-iommu-gfx-workaround.patch
intel-iommu-iommu-floppy-workaround.patch
intel-iommu-iommu-floppy-workaround-fix.patch
define-new-percpu-interface-for-shared-data-version-4.patch
use-the-new-percpu-interface-for-shared-data-version-4.patch
mm-implement-swap-prefetching.patch
rename-gfp_high_movable-to-gfp_highuser_movable-prefetch.patch
cpuset-zero-malloc-revert-the-old-cpuset-fix.patch
containersv10-share-css_group-arrays-between-tasks-with-same-container-memberships-cpuset-zero-malloc-fix-for-new-containers.patch
print-out-page_owner-statistics-in-relation-to-fragmentation-avoidance.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
