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| author | Oliver O'Halloran <oohall@gmail.com> | 2016-05-05 10:54:08 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-11 14:54:08 +0300 |
| commit | dd0b52c47a2d71b7960c9a5ce7d51f17ed03d9f5 (patch) | |
| tree | f9f9f0c7c1f0699056de5b8a4d5818afb8c400a7 | |
| parent | 66707836062db62756b395d1fb16ab02ff162862 (diff) | |
| download | linux-dd0b52c47a2d71b7960c9a5ce7d51f17ed03d9f5.tar.xz | |
powerpc/mm: define TOP_ZONE as a constant
The zone that contains the top of memory will be either ZONE_NORMAL
or ZONE_HIGHMEM depending on the kernel config. There are two functions
that require this information and both of them use an #ifdef to set
a local variable (top_zone). This is a little silly so lets just make it
a constant.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Cc: linux-mm@kvack.org
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/mm/mem.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 89677884ecc8..879e0bc6f82e 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -68,12 +68,15 @@ pte_t *kmap_pte; EXPORT_SYMBOL(kmap_pte); pgprot_t kmap_prot; EXPORT_SYMBOL(kmap_prot); +#define TOP_ZONE ZONE_HIGHMEM static inline pte_t *virt_to_kpte(unsigned long vaddr) { return pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), vaddr), vaddr), vaddr); } +#else +#define TOP_ZONE ZONE_NORMAL #endif int page_is_ram(unsigned long pfn) @@ -267,14 +270,9 @@ void __init limit_zone_pfn(enum zone_type zone, unsigned long pfn_limit) */ int dma_pfn_limit_to_zone(u64 pfn_limit) { - enum zone_type top_zone = ZONE_NORMAL; int i; -#ifdef CONFIG_HIGHMEM - top_zone = ZONE_HIGHMEM; -#endif - - for (i = top_zone; i >= 0; i--) { + for (i = TOP_ZONE; i >= 0; i--) { if (max_zone_pfns[i] <= pfn_limit) return i; } @@ -289,7 +287,6 @@ void __init paging_init(void) { unsigned long long total_ram = memblock_phys_mem_size(); phys_addr_t top_of_ram = memblock_end_of_DRAM(); - enum zone_type top_zone; #ifdef CONFIG_PPC32 unsigned long v = __fix_to_virt(__end_of_fixed_addresses - 1); @@ -313,13 +310,9 @@ void __init paging_init(void) (long int)((top_of_ram - total_ram) >> 20)); #ifdef CONFIG_HIGHMEM - top_zone = ZONE_HIGHMEM; limit_zone_pfn(ZONE_NORMAL, lowmem_end_addr >> PAGE_SHIFT); -#else - top_zone = ZONE_NORMAL; #endif - - limit_zone_pfn(top_zone, top_of_ram >> PAGE_SHIFT); + limit_zone_pfn(TOP_ZONE, top_of_ram >> PAGE_SHIFT); zone_limits_final = true; free_area_init_nodes(max_zone_pfns); |