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s390/mem_detect: remove artificial kdump memory types

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Simplify the memory detection code a bit by removing the CHUNK_OLDMEM
and CHUNK_CRASHK memory types.
They are not needed. Everything that is needed is a mechanism to
insert holes into the detected memory.

Reviewed-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
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
2013-04-30 19:19:58 +02:00
committed by Martin Schwidefsky
parent d3383632d4
commit 996b4a7d8f
5 changed files with 41 additions and 103 deletions
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28
arch/s390/kernel/setup.c
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@@ -463,14 +463,10 @@ static void __init setup_resources(void)
for (i = 0; i < MEMORY_CHUNKS; i++) {
if (!memory_chunk[i].size)
continue;
if (memory_chunk[i].type == CHUNK_OLDMEM ||
memory_chunk[i].type == CHUNK_CRASHK)
continue;
res = alloc_bootmem_low(sizeof(*res));
res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
switch (memory_chunk[i].type) {
case CHUNK_READ_WRITE:
case CHUNK_CRASHK:
res->name = "System RAM";
break;
case CHUNK_READ_ONLY:
@@ -527,7 +523,7 @@ static void __init setup_memory_end(void)
unsigned long align;
chunk = &memory_chunk[i];
if (chunk->type == CHUNK_OLDMEM)
if (!chunk->size)
continue;
align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1);
start = (chunk->addr + align - 1) & ~(align - 1);
@@ -579,7 +575,7 @@ static void __init setup_memory_end(void)
for (i = 0; i < MEMORY_CHUNKS; i++) {
struct mem_chunk *chunk = &memory_chunk[i];
if (chunk->type == CHUNK_OLDMEM)
if (!chunk->size)
continue;
if (chunk->addr >= memory_end) {
memset(chunk, 0, sizeof(*chunk));
@@ -680,15 +676,6 @@ static int __init verify_crash_base(unsigned long crash_base,
return -EINVAL;
}
/*
* Reserve kdump memory by creating a memory hole in the mem_chunk array
*/
static void __init reserve_kdump_bootmem(unsigned long addr, unsigned long size,
int type)
{
create_mem_hole(memory_chunk, addr, size, type);
}
/*
* When kdump is enabled, we have to ensure that no memory from
* the area [0 - crashkernel memory size] and
@@ -730,8 +717,8 @@ static void reserve_oldmem(void)
real_size = max(real_size, chunk->addr + chunk->size);
}
reserve_kdump_bootmem(OLDMEM_BASE, OLDMEM_SIZE, CHUNK_OLDMEM);
reserve_kdump_bootmem(OLDMEM_SIZE, real_size - OLDMEM_SIZE, CHUNK_OLDMEM);
create_mem_hole(memory_chunk, OLDMEM_BASE, OLDMEM_SIZE);
create_mem_hole(memory_chunk, OLDMEM_SIZE, real_size - OLDMEM_SIZE);
if (OLDMEM_BASE + OLDMEM_SIZE == real_size)
saved_max_pfn = PFN_DOWN(OLDMEM_BASE) - 1;
else
@@ -774,7 +761,7 @@ static void __init reserve_crashkernel(void)
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
insert_resource(&iomem_resource, &crashk_res);
reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK);
create_mem_hole(memory_chunk, crash_base, crash_size);
pr_info("Reserving %lluMB of memory at %lluMB "
"for crashkernel (System RAM: %luMB)\n",
crash_size >> 20, crash_base >> 20, memory_end >> 20);
@@ -846,11 +833,10 @@ static void __init setup_memory(void)
* Register RAM areas with the bootmem allocator.
*/
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
for (i = 0; i < MEMORY_CHUNKS; i++) {
unsigned long start_chunk, end_chunk, pfn;
if (memory_chunk[i].type != CHUNK_READ_WRITE &&
memory_chunk[i].type != CHUNK_CRASHK)
if (!memory_chunk[i].size)
continue;
start_chunk = PFN_DOWN(memory_chunk[i].addr);
end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size);