[PATCH v2 3/6] sh: prefer memblock APIs returning virtual address

Mike Rapoport
2018-12-03T15:47:56Z

Rather than use the memblock_alloc_base that returns a physical address and
then convert this address to the virtual one, use appropriate memblock
function that returns a virtual address.

There is a small functional change in the allocation of then NODE_DATA().
Instead of panicing if the local allocation failed, the non-local
allocation attempt will be made.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
arch/sh/mm/init.c | 18 +++++-------------
arch/sh/mm/numa.c | 5 ++---
2 files changed, 7 insertions(+), 16 deletions(-)

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index c8c13c77..3576b5f 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -192,24 +192,16 @@ void __init page_table_range_init(unsigned long start, unsigned long end,
void __init allocate_pgdat(unsigned int nid)
{
unsigned long start_pfn, end_pfn;
-#ifdef CONFIG_NEED_MULTIPLE_NODES
- unsigned long phys;
-#endif

get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);

#ifdef CONFIG_NEED_MULTIPLE_NODES
- phys = __memblock_alloc_base(sizeof(struct pglist_data),
- SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT);
- /* Retry with all of system memory */
- if (!phys)
- phys = __memblock_alloc_base(sizeof(struct pglist_data),
- SMP_CACHE_BYTES, memblock_end_of_DRAM());
- if (!phys)
+ NODE_DATA(nid) = memblock_alloc_try_nid_nopanic(
+ sizeof(struct pglist_data),
+ SMP_CACHE_BYTES, MEMBLOCK_LOW_LIMIT,
+ MEMBLOCK_ALLOC_ACCESSIBLE, nid);
+ if (!NODE_DATA(nid))
panic("Can't allocate pgdat for node %d\n", nid);
-
- NODE_DATA(nid) = __va(phys);
- memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
#endif

NODE_DATA(nid)->node_start_pfn = start_pfn;
diff --git a/arch/sh/mm/numa.c b/arch/sh/mm/numa.c
index 830e8b3..c4bde61 100644
--- a/arch/sh/mm/numa.c
+++ b/arch/sh/mm/numa.c
@@ -41,9 +41,8 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
__add_active_range(nid, start_pfn, end_pfn);

/* Node-local pgdat */
- NODE_DATA(nid) = __va(memblock_alloc_base(sizeof(struct pglist_data),
- SMP_CACHE_BYTES, end));
- memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
+ NODE_DATA(nid) = memblock_alloc_node(sizeof(struct pglist_data),
+ SMP_CACHE_BYTES, nid);

NODE_DATA(nid)->node_start_pfn = start_pfn;
NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
--
2.7.4