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[S390] Get rid of HOLES_IN_ZONE requirement. 

Align everything to MAX_ORDER so we can get rid of the extra checks.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2008-01-26 14:11:02 +01:00 committed by Martin Schwidefsky
parent 5c699714d0
commit 9f4b0ba81f
3 changed files with 25 additions and 5 deletions
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3
arch/s390/Kconfig
View File

@ -276,9 +276,6 @@ source "kernel/Kconfig.preempt"
source "mm/Kconfig"
config HOLES_IN_ZONE
def_bool y
comment "I/O subsystem configuration"
config MACHCHK_WARNING

25
arch/s390/kernel/setup.c
View File

@ -559,7 +559,9 @@ setup_resources(void)
data_resource.start = (unsigned long) &_etext;
data_resource.end = (unsigned long) &_edata - 1;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
for (i = 0; i < MEMORY_CHUNKS; i++) {
if (!memory_chunk[i].size)
continue;
res = alloc_bootmem_low(sizeof(struct resource));
res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
switch (memory_chunk[i].type) {
@ -630,6 +632,27 @@ static void __init setup_memory_end(void)
max_mem = memory_end ? min(VMALLOC_START, memory_end) : VMALLOC_START;
memory_end = min(max_mem, memory_end);
/*
* Make sure all chunks are MAX_ORDER aligned so we don't need the
* extra checks that HOLES_IN_ZONE would require.
*/
for (i = 0; i < MEMORY_CHUNKS; i++) {
unsigned long start, end;
struct mem_chunk *chunk;
unsigned long align;
chunk = &memory_chunk[i];
align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1);
start = (chunk->addr + align - 1) & ~(align - 1);
end = (chunk->addr + chunk->size) & ~(align - 1);
if (start >= end)
memset(chunk, 0, sizeof(*chunk));
else {
chunk->addr = start;
chunk->size = end - start;
}
}
for (i = 0; i < MEMORY_CHUNKS; i++) {
struct mem_chunk *chunk = &memory_chunk[i];

2
arch/s390/mm/vmem.c
View File

@ -376,7 +376,7 @@ static int __init vmem_convert_memory_chunk(void)
int i;
mutex_lock(&vmem_mutex);
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
for (i = 0; i < MEMORY_CHUNKS; i++) {
if (!memory_chunk[i].size)
continue;
seg = kzalloc(sizeof(*seg), GFP_KERNEL);