bootmem: remove alloc_arch_preferred_bootmem()

The name of this function is not suitable, and removing the function and
open-coding it into each call sites makes the code more understandable.

Additionally, we shouldn't do an allocation from bootmem when
slab_is_available(), so directly return kmalloc()'s return value.

Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 16 deletions

diff --git a/mm/bootmem.c b/mm/bootmem.c
index 4730931b45a9..26d057a8b552 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -575,15 +575,6 @@ find_block:
         return NULL;
 }
 
-static void * __init alloc_arch_preferred_bootmem(bootmem_data_t *bdata,
-                                        unsigned long size, unsigned long align,
-                                        unsigned long goal, unsigned long limit)
-{
-        if (WARN_ON_ONCE(slab_is_available()))
-                return kzalloc(size, GFP_NOWAIT);
-        return NULL;
-}
-
 static void * __init alloc_bootmem_core(unsigned long size,
                                         unsigned long align,
                                         unsigned long goal,
@@ -592,9 +583,8 @@ static void * __init alloc_bootmem_core(unsigned long size,
         bootmem_data_t *bdata;
         void *region;
 
-        region = alloc_arch_preferred_bootmem(NULL, size, align, goal, limit);
-        if (region)
-                return region;
+        if (WARN_ON_ONCE(slab_is_available()))
+                return kzalloc(size, GFP_NOWAIT);
 
         list_for_each_entry(bdata, &bdata_list, list) {
                 if (goal && bdata->node_low_pfn <= PFN_DOWN(goal))
@@ -692,11 +682,9 @@ void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
 {
         void *ptr;
 
+        if (WARN_ON_ONCE(slab_is_available()))
+                return kzalloc(size, GFP_NOWAIT);
 again:
-        ptr = alloc_arch_preferred_bootmem(pgdat->bdata, size,
-                                           align, goal, limit);
-        if (ptr)
-                return ptr;
 
         /* do not panic in alloc_bootmem_bdata() */
         if (limit && goal + size > limit)