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authorHeiko Carstens <heiko.carstens@de.ibm.com>2006-11-06 10:49:00 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-11-06 10:49:00 +0100
commitbcc8bcb1f0cc51c0042497d5de2d79743050e3bb (patch)
treeb60d66fb534589a2770f69265ccc768977711993 /arch/s390/mm/init.c
parentd1ed6a3ea10aa7b199c434f6ffd1b6761896567a (diff)
downloadop-kernel-dev-bcc8bcb1f0cc51c0042497d5de2d79743050e3bb.zip
op-kernel-dev-bcc8bcb1f0cc51c0042497d5de2d79743050e3bb.tar.gz
[S390] revert add_active_range() usage patch.
Commit 7676bef9c183fd573822cac9992927ef596d584c breaks DCSS support on s390. DCSS needs initialized struct pages to work. With the usage of add_active_range() only the struct pages for physically present pages are initialized. This could be fixed if the DCSS driver would initiliaze the struct pages itself, but this doesn't work too. This is because the mem_map array does not include holes after the last present memory area and therefore there is nothing that could be initialized. To fix this and to avoid some dirty hacks revert this patch for now. Will be added later when we move to a virtual mem_map. Cc: Carsten Otte <cotte@de.ibm.com> Cc: Adrian Bunk <bunk@stusta.de> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/init.c')
-rw-r--r--arch/s390/mm/init.c32
1 files changed, 22 insertions, 10 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index d998917..e1881c3 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -84,6 +84,7 @@ void show_mem(void)
printk("%d pages swap cached\n",cached);
}
+extern unsigned long __initdata zholes_size[];
/*
* paging_init() sets up the page tables
*/
@@ -100,15 +101,16 @@ void __init paging_init(void)
unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERNSEG_TABLE;
static const int ssm_mask = 0x04000000L;
unsigned long ro_start_pfn, ro_end_pfn;
- unsigned long max_zone_pfns[MAX_NR_ZONES];
+ unsigned long zones_size[MAX_NR_ZONES];
ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);
ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);
- memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
- max_zone_pfns[ZONE_DMA] = max_low_pfn;
- max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
- free_area_init_nodes(max_zone_pfns);
+ memset(zones_size, 0, sizeof(zones_size));
+ zones_size[ZONE_DMA] = max_low_pfn;
+ free_area_init_node(0, &contig_page_data, zones_size,
+ __pa(PAGE_OFFSET) >> PAGE_SHIFT,
+ zholes_size);
/* unmap whole virtual address space */
@@ -168,16 +170,26 @@ void __init paging_init(void)
unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) |
_KERN_REGION_TABLE;
static const int ssm_mask = 0x04000000L;
+ unsigned long zones_size[MAX_NR_ZONES];
+ unsigned long dma_pfn, high_pfn;
unsigned long ro_start_pfn, ro_end_pfn;
- unsigned long max_zone_pfns[MAX_NR_ZONES];
+ memset(zones_size, 0, sizeof(zones_size));
+ dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
+ high_pfn = max_low_pfn;
ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);
ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);
- memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
- max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);
- max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
- free_area_init_nodes(max_zone_pfns);
+ if (dma_pfn > high_pfn)
+ zones_size[ZONE_DMA] = high_pfn;
+ else {
+ zones_size[ZONE_DMA] = dma_pfn;
+ zones_size[ZONE_NORMAL] = high_pfn - dma_pfn;
+ }
+
+ /* Initialize mem_map[]. */
+ free_area_init_node(0, &contig_page_data, zones_size,
+ __pa(PAGE_OFFSET) >> PAGE_SHIFT, zholes_size);
/*
* map whole physical memory to virtual memory (identity mapping)
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