mm/slub: beautify code for 80 column limitation and tab alignment

Be sure of 80 column limitation for both code and comments.

Correct tab alignment for 'if-else' statement.

Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

1 files changed, 56 insertions, 36 deletions

diff --git a/mm/slub.c b/mm/slub.c
index 4636c8810b8d..d51f75d565c8 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -373,7 +373,8 @@ static inline bool __cmpxchg_double_slab(struct kmem_cache *s, struct page *page
 #endif
         {
                 slab_lock(page);
-                if (page->freelist == freelist_old && page->counters == counters_old) {
+                if (page->freelist == freelist_old &&
+                                        page->counters == counters_old) {
                         page->freelist = freelist_new;
                         page->counters = counters_new;
                         slab_unlock(page);
@@ -411,7 +412,8 @@ static inline bool cmpxchg_double_slab(struct kmem_cache *s, struct page *page,
 
                 local_irq_save(flags);
                 slab_lock(page);
-                if (page->freelist == freelist_old && page->counters == counters_old) {
+                if (page->freelist == freelist_old &&
+                                        page->counters == counters_old) {
                         page->freelist = freelist_new;
                         page->counters = counters_new;
                         slab_unlock(page);
@@ -553,8 +555,9 @@ static void print_tracking(struct kmem_cache *s, void *object)
 
 static void print_page_info(struct page *page)
 {
-        printk(KERN_ERR "INFO: Slab 0x%p objects=%u used=%u fp=0x%p flags=0x%04lx\n",
-                page, page->objects, page->inuse, page->freelist, page->flags);
+        printk(KERN_ERR
+               "INFO: Slab 0x%p objects=%u used=%u fp=0x%p flags=0x%04lx\n",
+               page, page->objects, page->inuse, page->freelist, page->flags);
 
 }
 
@@ -629,7 +632,8 @@ static void object_err(struct kmem_cache *s, struct page *page,
         print_trailer(s, page, object);
 }
 
-static void slab_err(struct kmem_cache *s, struct page *page, const char *fmt, ...)
+static void slab_err(struct kmem_cache *s, struct page *page,
+                        const char *fmt, ...)
 {
         va_list args;
         char buf[100];
@@ -788,7 +792,8 @@ static int check_object(struct kmem_cache *s, struct page *page,
         } else {
                 if ((s->flags & SLAB_POISON) && s->object_size < s->inuse) {
                         check_bytes_and_report(s, page, p, "Alignment padding",
-                                endobject, POISON_INUSE, s->inuse - s->object_size);
+                                endobject, POISON_INUSE,
+                                s->inuse - s->object_size);
                 }
         }
 
@@ -918,7 +923,8 @@ static void trace(struct kmem_cache *s, struct page *page, void *object,
                         page->freelist);
 
                 if (!alloc)
-                        print_section("Object ", (void *)object, s->object_size);
+                        print_section("Object ", (void *)object,
+                                        s->object_size);
 
                 dump_stack();
         }
@@ -937,7 +943,8 @@ static inline int slab_pre_alloc_hook(struct kmem_cache *s, gfp_t flags)
         return should_failslab(s->object_size, flags, s->flags);
 }
 
-static inline void slab_post_alloc_hook(struct kmem_cache *s, gfp_t flags, void *object)
+static inline void slab_post_alloc_hook(struct kmem_cache *s,
+                                        gfp_t flags, void *object)
 {
         flags &= gfp_allowed_mask;
         kmemcheck_slab_alloc(s, flags, object, slab_ksize(s));
@@ -1039,7 +1046,8 @@ static void setup_object_debug(struct kmem_cache *s, struct page *page,
         init_tracking(s, object);
 }
 
-static noinline int alloc_debug_processing(struct kmem_cache *s, struct page *page,
+static noinline int alloc_debug_processing(struct kmem_cache *s,
+                                        struct page *page,
                                         void *object, unsigned long addr)
 {
         if (!check_slab(s, page))
@@ -1743,7 +1751,8 @@ static void init_kmem_cache_cpus(struct kmem_cache *s)
 /*
  * Remove the cpu slab
  */
-static void deactivate_slab(struct kmem_cache *s, struct page *page, void *freelist)
+static void deactivate_slab(struct kmem_cache *s, struct page *page,
+                                void *freelist)
 {
         enum slab_modes { M_NONE, M_PARTIAL, M_FULL, M_FREE };
         struct kmem_cache_node *n = get_node(s, page_to_nid(page));
@@ -2002,7 +2011,8 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain)
                 page->pobjects = pobjects;
                 page->next = oldpage;
 
-        } while (this_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page) != oldpage);
+        } while (this_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page)
+                                                                != oldpage);
 #endif
 }
 
@@ -2172,8 +2182,8 @@ static inline bool pfmemalloc_match(struct page *page, gfp_t gfpflags)
 }
 
 /*
- * Check the page->freelist of a page and either transfer the freelist to the per cpu freelist
- * or deactivate the page.
+ * Check the page->freelist of a page and either transfer the freelist to the
+ * per cpu freelist or deactivate the page.
  *
  * The page is still frozen if the return value is not NULL.
  *
@@ -2317,7 +2327,8 @@ new_slab:
                 goto load_freelist;
 
         /* Only entered in the debug case */
-        if (kmem_cache_debug(s) && !alloc_debug_processing(s, page, freelist, addr))
+        if (kmem_cache_debug(s) &&
+                        !alloc_debug_processing(s, page, freelist, addr))
                 goto new_slab;  /* Slab failed checks. Next slab needed */
 
         deactivate_slab(s, page, get_freepointer(s, freelist));
@@ -2385,13 +2396,15 @@ redo:
                  * The cmpxchg will only match if there was no additional
                  * operation and if we are on the right processor.
                  *
-                 * The cmpxchg does the following atomically (without lock semantics!)
+                 * The cmpxchg does the following atomically (without lock
+                 * semantics!)
                  * 1. Relocate first pointer to the current per cpu area.
                  * 2. Verify that tid and freelist have not been changed
                  * 3. If they were not changed replace tid and freelist
                  *
-                 * Since this is without lock semantics the protection is only against
-                 * code executing on this cpu *not* from access by other cpus.
+                 * Since this is without lock semantics the protection is only
+                 * against code executing on this cpu *not* from access by
+                 * other cpus.
                  */
                 if (unlikely(!this_cpu_cmpxchg_double(
                                 s->cpu_slab->freelist, s->cpu_slab->tid,
@@ -2423,7 +2436,8 @@ void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
 {
         void *ret = slab_alloc(s, gfpflags, _RET_IP_);
 
-        trace_kmem_cache_alloc(_RET_IP_, ret, s->object_size, s->size, gfpflags);
+        trace_kmem_cache_alloc(_RET_IP_, ret, s->object_size,
+                                s->size, gfpflags);
 
         return ret;
 }
@@ -2515,8 +2529,10 @@ static void __slab_free(struct kmem_cache *s, struct page *page,
                         if (kmem_cache_has_cpu_partial(s) && !prior)
 
                                 /*
-                                 * Slab was on no list before and will be partially empty
-                                 * We can defer the list move and instead freeze it.
+                                 * Slab was on no list before and will be
+                                 * partially empty
+                                 * We can defer the list move and instead
+                                 * freeze it.
                                  */
                                 new.frozen = 1;
 
@@ -3074,8 +3090,8 @@ static int kmem_cache_open(struct kmem_cache *s, unsigned long flags)
          * A) The number of objects from per cpu partial slabs dumped to the
          *    per node list when we reach the limit.
          * B) The number of objects in cpu partial slabs to extract from the
-         *    per node list when we run out of per cpu objects. We only fetch 50%
-         *    to keep some capacity around for frees.
+         *    per node list when we run out of per cpu objects. We only fetch
+         *    50% to keep some capacity around for frees.
          */
         if (!kmem_cache_has_cpu_partial(s))
                 s->cpu_partial = 0;
@@ -3102,8 +3118,8 @@ error:
         if (flags & SLAB_PANIC)
                 panic("Cannot create slab %s size=%lu realsize=%u "
                         "order=%u offset=%u flags=%lx\n",
-                        s->name, (unsigned long)s->size, s->size, oo_order(s->oo),
-                        s->offset, flags);
+                        s->name, (unsigned long)s->size, s->size,
+                        oo_order(s->oo), s->offset, flags);
         return -EINVAL;
 }
 
@@ -3341,7 +3357,8 @@ bool verify_mem_not_deleted(const void *x)
 
         slab_lock(page);
         if (on_freelist(page->slab_cache, page, object)) {
-                object_err(page->slab_cache, page, object, "Object is on free-list");
+                object_err(page->slab_cache, page, object,
+                                "Object is on free-list");
                 rv = false;
         } else {
                 rv = true;
@@ -4165,15 +4182,17 @@ static int list_locations(struct kmem_cache *s, char *buf,
                                 !cpumask_empty(to_cpumask(l->cpus)) &&
                                 len < PAGE_SIZE - 60) {
                         len += sprintf(buf + len, " cpus=");
-                        len += cpulist_scnprintf(buf + len, PAGE_SIZE - len - 50,
+                        len += cpulist_scnprintf(buf + len,
+                                                 PAGE_SIZE - len - 50,
                                                  to_cpumask(l->cpus));
                 }
 
                 if (nr_online_nodes > 1 && !nodes_empty(l->nodes) &&
                                 len < PAGE_SIZE - 60) {
                         len += sprintf(buf + len, " nodes=");
-                        len += nodelist_scnprintf(buf + len, PAGE_SIZE - len - 50,
-                                        l->nodes);
+                        len += nodelist_scnprintf(buf + len,
+                                                  PAGE_SIZE - len - 50,
+                                                  l->nodes);
                 }
 
                 len += sprintf(buf + len, "\n");
@@ -4280,7 +4299,8 @@ static ssize_t show_slab_objects(struct kmem_cache *s,
                 int cpu;
 
                 for_each_possible_cpu(cpu) {
-                        struct kmem_cache_cpu *c = per_cpu_ptr(s->cpu_slab, cpu);
+                        struct kmem_cache_cpu *c = per_cpu_ptr(s->cpu_slab,
+                                                               cpu);
                         int node;
                         struct page *page;
 
@@ -4314,12 +4334,11 @@ static ssize_t show_slab_objects(struct kmem_cache *s,
                 for_each_node_state(node, N_NORMAL_MEMORY) {
                         struct kmem_cache_node *n = get_node(s, node);
 
-                if (flags & SO_TOTAL)
-                        x = atomic_long_read(&n->total_objects);
-                else if (flags & SO_OBJECTS)
-                        x = atomic_long_read(&n->total_objects) -
-                                count_partial(n, count_free);
-
+                        if (flags & SO_TOTAL)
+                                x = atomic_long_read(&n->total_objects);
+                        else if (flags & SO_OBJECTS)
+                                x = atomic_long_read(&n->total_objects) -
+                                        count_partial(n, count_free);
                         else
                                 x = atomic_long_read(&n->nr_slabs);
                         total += x;
@@ -5135,7 +5154,8 @@ static char *create_unique_id(struct kmem_cache *s)
 
 #ifdef CONFIG_MEMCG_KMEM
         if (!is_root_cache(s))
-                p += sprintf(p, "-%08d", memcg_cache_id(s->memcg_params->memcg));
+                p += sprintf(p, "-%08d",
+                                memcg_cache_id(s->memcg_params->memcg));
 #endif
 
         BUG_ON(p > name + ID_STR_LENGTH - 1);