From: Tejun Heo Date: Wed, 9 Dec 2009 23:43:16 +0000 (+0900) Subject: vmalloc: conditionalize build of pcpu_get_vm_areas() X-Git-Tag: firefly_0821_release~11625^2~505 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f0cc8412be0a164f9472f161dfd74fc1ca6ac284;p=firefly-linux-kernel-4.4.55.git vmalloc: conditionalize build of pcpu_get_vm_areas() No matching upstream commit as it was resolved differently there. 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 Reported-by: Jan Beulich Signed-off-by: Greg Kroah-Hartman --- diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 227c2a585e4f..3c123c35c94e 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 0f551a4a44cd..775872681d0c 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