Commit 0189103c authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky

[S390] Remove BUILD_BUG_ON() in vmem code.

Remove BUILD_BUG_ON() in vmem code since it causes build failures if
the size of struct page increases. Instead calculate at compile time
the address of the highest physical address that can be added to the
1:1 mapping.
This supposed to fix a build failure with the page owner tracking leak
detector patches as reported by akpm.

page-owner-tracking-leak-detector-broken-on-s390.patch can be removed
from -mm again when this is merged.

Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent e35e1fad
......@@ -528,7 +528,7 @@ static void __init setup_memory_end(void)
memory_size = 0;
memory_end &= PAGE_MASK;
max_mem = memory_end ? min(VMALLOC_START, memory_end) : VMALLOC_START;
max_mem = memory_end ? min(VMEM_MAX_PHYS, memory_end) : VMEM_MAX_PHYS;
memory_end = min(max_mem, memory_end);
/*
......
......@@ -250,7 +250,7 @@ static int insert_memory_segment(struct memory_segment *seg)
{
struct memory_segment *tmp;
if (seg->start + seg->size >= VMALLOC_START ||
if (seg->start + seg->size >= VMEM_MAX_PHYS ||
seg->start + seg->size < seg->start)
return -ERANGE;
......@@ -360,7 +360,6 @@ void __init vmem_map_init(void)
{
int i;
BUILD_BUG_ON((unsigned long)VMEM_MAP + VMEM_MAP_SIZE > VMEM_MAP_MAX);
NODE_DATA(0)->node_mem_map = VMEM_MAP;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++)
vmem_add_mem(memory_chunk[i].addr, memory_chunk[i].size);
......
......@@ -115,15 +115,21 @@ extern char empty_zero_page[PAGE_SIZE];
#ifndef __s390x__
#define VMALLOC_START 0x78000000UL
#define VMALLOC_END 0x7e000000UL
#define VMEM_MAP_MAX 0x80000000UL
#define VMEM_MAP_END 0x80000000UL
#else /* __s390x__ */
#define VMALLOC_START 0x3e000000000UL
#define VMALLOC_END 0x3e040000000UL
#define VMEM_MAP_MAX 0x40000000000UL
#define VMEM_MAP_END 0x40000000000UL
#endif /* __s390x__ */
/*
* VMEM_MAX_PHYS is the highest physical address that can be added to the 1:1
* mapping. This needs to be calculated at compile time since the size of the
* VMEM_MAP is static but the size of struct page can change.
*/
#define VMEM_MAX_PHYS min(VMALLOC_START, ((VMEM_MAP_END - VMALLOC_END) / \
sizeof(struct page) * PAGE_SIZE) & ~((16 << 20) - 1))
#define VMEM_MAP ((struct page *) VMALLOC_END)
#define VMEM_MAP_SIZE ((VMALLOC_START / PAGE_SIZE) * sizeof(struct page))
/*
* A 31 bit pagetable entry of S390 has following format:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment