Messages in this thread Patch in this message | | | Date | Thu, 10 Dec 2009 08:43:16 +0900 | From | Tejun Heo <> | Subject | [PATCH -stable] vmalloc: conditionalize build of pcpu_get_vm_areas() |
| |
pcpu_get_vm_areas() is used only when dynamic percpu allocator is used by the architecture. In 2.6.32, ia64 doesn't use dynamic percpu allocator and has a macro which makes pcpu_get_vm_areas() buggy via local/global variable aliasing and triggers compile warning.
The problem is fixed in upstream and ia64 uses dynamic percpu allocators, so the only left issue is inclusion of unnecessary code and compile warning on ia64 on 2.6.32.
Don't build pcpu_get_vm_areas() if legacy percpu allocator is in use.
Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Jan Beulich <JBeulich@novell.com> Cc: stable@kernel.org --- Please note that this commit won't appear on upstream.
Thanks.
include/linux/vmalloc.h | 2 ++ mm/vmalloc.c | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 227c2a5..3c123c3 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -115,9 +115,11 @@ extern rwlock_t vmlist_lock; extern struct vm_struct *vmlist; extern __init void vm_area_register_early(struct vm_struct *vm, size_t align); +#ifndef CONFIG_HAVE_LEGACY_PER_CPU_AREA struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, const size_t *sizes, int nr_vms, size_t align, gfp_t gfp_mask); +#endif void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms); diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 0f551a4..7758726 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1993,6 +1993,7 @@ void free_vm_area(struct vm_struct *area) } EXPORT_SYMBOL_GPL(free_vm_area); +#ifndef CONFIG_HAVE_LEGACY_PER_CPU_AREA static struct vmap_area *node_to_va(struct rb_node *n) { return n ? rb_entry(n, struct vmap_area, rb_node) : NULL; @@ -2257,6 +2258,7 @@ err_free: kfree(vms); return NULL; } +#endif /** * pcpu_free_vm_areas - free vmalloc areas for percpu allocator
| |