[PATCH 2/4] memblock: add memblock_virt_alloc_nid_nopanic()

[Luiz Capitulino <lcapitulino@redhat.com>]

From: Luiz capitulino <lcapitulino@redhat.com>

This function tries to allocate memory from the specified node only (vs.
falling back to other nodes).

This is going to be used by HugeTLB boot-time allocation code in next
commits.

Signed-off-by: Luiz capitulino <lcapitulino@redhat.com>
---
 include/linux/bootmem.h |  4 ++++
 mm/memblock.c           | 30 ++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index db51fe4..6961b11 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -153,6 +153,10 @@ extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
 		phys_addr_t align, phys_addr_t min_addr,
 		phys_addr_t max_addr, int nid);
+void * __init memblock_virt_alloc_nid_nopanic(
+				phys_addr_t size, phys_addr_t align,
+				phys_addr_t min_addr, phys_addr_t max_addr,
+				int nid);
 void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
 		phys_addr_t min_addr, phys_addr_t max_addr, int nid);
 void __memblock_free_early(phys_addr_t base, phys_addr_t size);
diff --git a/mm/memblock.c b/mm/memblock.c
index f3821ef..2a5d72e 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1157,6 +1157,36 @@ void * __init memblock_virt_alloc_try_nid_nopanic(
 }
 
 /**
+ * memblock_virt_alloc_nid_nopanic - allocate boot memory block from
+ * specified node
+ * @size: size of memory block to be allocated in bytes
+ * @align: alignment of the region and block's size
+ * @min_addr: the lower bound of the memory region from where the allocation
+ *	  is preferred (phys address)
+ * @max_addr: the upper bound of the memory region from where the allocation
+ *	      is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to
+ *	      allocate only from memory limited by memblock.current_limit value
+ * @nid: nid of the free area to find, %NUMA_NO_NODE for any node
+ *
+ * This function tries to allocate memory from @nid only. It @nid doesn't
+ * have enough memory, this function returns failure.
+ *
+ * RETURNS:
+ * Virtual address of allocated memory block on success, NULL on failure.
+ */
+void * __init memblock_virt_alloc_nid_nopanic(
+				phys_addr_t size, phys_addr_t align,
+				phys_addr_t min_addr, phys_addr_t max_addr,
+				int nid)
+{
+	memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n",
+		     __func__, (u64)size, (u64)align, nid, (u64)min_addr,
+		     (u64)max_addr, (void *)_RET_IP_);
+	return memblock_virt_alloc_internal(size, align, min_addr,
+					     max_addr, nid, __GFP_THISNODE);
+}
+
+/**
  * memblock_virt_alloc_try_nid - allocate boot memory block with panicking
  * @size: size of memory block to be allocated in bytes
  * @align: alignment of the region and block's size
-- 
1.8.1.4

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>