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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2010-07-03 01:24:53 +0200
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2010-07-31 16:16:45 +0200
commit6d457cc14e57816aedcb8a7e7ea04b0dbeec0ec6 (patch)
tree8d4e02f7256890d04dfbb13fd4846b19bf0d56f7 /linux/dev/glue
parent38a058ad3e5b0ff21fa6d12ce9d29af70a0db826 (diff)
Put a name on the 16MiB magic number
* linux/dev/glue/kmem.c (MEM_DMA_LIMIT): New macro (linux_kmem_init): Replace 16 * 1024 * 1024 occurrences with MEM_DMA_LIMIT.
Diffstat (limited to 'linux/dev/glue')
-rw-r--r--linux/dev/glue/kmem.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/linux/dev/glue/kmem.c b/linux/dev/glue/kmem.c
index 908d086..8c21ce7 100644
--- a/linux/dev/glue/kmem.c
+++ b/linux/dev/glue/kmem.c
@@ -48,6 +48,7 @@ extern int printf (const char *, ...);
Increase MEM_CHUNKS if the kernel is running out of memory. */
#define MEM_CHUNK_SIZE (64 * 1024)
#define MEM_CHUNKS 7
+#define MEM_DMA_LIMIT (16 * 1024 * 1024)
/* Mininum amount that linux_kmalloc will allocate. */
#define MIN_ALLOC 12
@@ -100,7 +101,7 @@ linux_kmem_init ()
{
/* Allocate memory. */
pages_free[i].start = (unsigned long) alloc_contig_mem (MEM_CHUNK_SIZE,
- 16 * 1024 * 1024,
+ MEM_DMA_LIMIT,
0xffff, &pages);
assert (pages_free[i].start);
@@ -109,7 +110,7 @@ linux_kmem_init ()
/* Sanity check: ensure pages are contiguous and within DMA limits. */
for (p = pages, j = 0; j < MEM_CHUNK_SIZE - PAGE_SIZE; j += PAGE_SIZE)
{
- assert (p->phys_addr < 16 * 1024 * 1024);
+ assert (p->phys_addr < MEM_DMA_LIMIT);
assert (p->phys_addr + PAGE_SIZE
== ((vm_page_t) p->pageq.next)->phys_addr);