diff options
| -rw-r--r-- | arch/s390/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/s390/mm/vmem.c | 3 | ||||
| -rw-r--r-- | include/asm-s390/pgtable.h | 12 |
3 files changed, 11 insertions, 6 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 72d20f70f8a..29ae165d174 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -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); /* diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index 07e04677724..7c1287ccf78 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -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); diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h index 79b9eab1a0c..3f520754e71 100644 --- a/include/asm-s390/pgtable.h +++ b/include/asm-s390/pgtable.h @@ -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: |