mm/vmalloc.c: use helper function va_size()

Use helper function va_size() to improve code readability. No functional
modification involved.

Link: https://lkml.kernel.org/r/20240906102539.3537207-1-zhangpeng362@huawei.com
Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index efba551d81aa54b1d81200d9f7958ca8a61d53dc..cf2af80157bcd16cc27140a50fcfd4954d4185b9 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1940,7 +1940,7 @@ static inline void setup_vmalloc_vm(struct vm_struct *vm,
 {
        vm->flags = flags;
        vm->addr = (void *)va->va_start;
-       vm->size = va->va_end - va->va_start;
+       vm->size = va_size(va);
        vm->caller = caller;
        va->vm = vm;
 }
@@ -2018,7 +2018,7 @@ retry:
 
        if (vm) {
                vm->addr = (void *)va->va_start;
-               vm->size = va->va_end - va->va_start;
+               vm->size = va_size(va);
                va->vm = vm;
        }
 
@@ -2192,7 +2192,7 @@ static void purge_vmap_node(struct work_struct *work)
        vn->nr_purged = 0;
 
        list_for_each_entry_safe(va, n_va, &vn->purge_list, list) {
-               unsigned long nr = (va->va_end - va->va_start) >> PAGE_SHIFT;
+               unsigned long nr = va_size(va) >> PAGE_SHIFT;
                unsigned long orig_start = va->va_start;
                unsigned long orig_end = va->va_end;
                unsigned int vn_id = decode_vn_id(va->flags);
@@ -2336,8 +2336,8 @@ static void free_vmap_area_noflush(struct vmap_area *va)
        if (WARN_ON_ONCE(!list_empty(&va->list)))
                return;
 
-       nr_lazy = atomic_long_add_return((va->va_end - va->va_start) >>
-                               PAGE_SHIFT, &vmap_lazy_nr);
+       nr_lazy = atomic_long_add_return(va_size(va) >> PAGE_SHIFT,
+                                        &vmap_lazy_nr);
 
        /*
         * If it was request by a certain node we would like to
@@ -2933,8 +2933,7 @@ void vm_unmap_ram(const void *mem, unsigned int count)
        if (WARN_ON_ONCE(!va))
                return;
 
-       debug_check_no_locks_freed((void *)va->va_start,
-                                   (va->va_end - va->va_start));
+       debug_check_no_locks_freed((void *)va->va_start, va_size(va));
        free_unmap_vmap_area(va);
 }
 EXPORT_SYMBOL(vm_unmap_ram);
@@ -4932,7 +4931,7 @@ static void show_purge_info(struct seq_file *m)
                list_for_each_entry(va, &vn->lazy.head, list) {
                        seq_printf(m, "0x%pK-0x%pK %7ld unpurged vm_area\n",
                                (void *)va->va_start, (void *)va->va_end,
-                               va->va_end - va->va_start);
+                               va_size(va));
                }
                spin_unlock(&vn->lazy.lock);
        }
@@ -4954,7 +4953,7 @@ static int vmalloc_info_show(struct seq_file *m, void *p)
                                if (va->flags & VMAP_RAM)
                                        seq_printf(m, "0x%pK-0x%pK %7ld vm_map_ram\n",
                                                (void *)va->va_start, (void *)va->va_end,
-                                               va->va_end - va->va_start);
+                                               va_size(va));
 
                                continue;
                        }