Hi Jiang
On Wed, May 8, 2013 at 11:51 PM, Jiang Liu <liu...@gmail.com> wrote:
> Prepare for removing num_physpages and simplify mem_init().
>
> Signed-off-by: Jiang Liu <jiang....@huawei.com>
> Cc: Mike Frysinger <vap...@gentoo.org>
> Cc: Bob Liu <lliu...@gmail.com>
> Cc: uclinux-dist-devel@blackfin.uclinux.org
> Cc: linux-ker...@vger.kernel.org
> ---
> arch/blackfin/mm/init.c | 38 ++++++--------------------------------
> 1 file changed, 6 insertions(+), 32 deletions(-)
>
> diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
> index 1cc8607..e4b6e11 100644
> --- a/arch/blackfin/mm/init.c
> +++ b/arch/blackfin/mm/init.c
> @@ -90,43 +90,17 @@ asmlinkage void __init init_pda(void)
>
> void __init mem_init(void)
> {
> - unsigned int codek = 0, datak = 0, initk = 0;
> - unsigned int reservedpages = 0, freepages = 0;
> - unsigned long tmp;
> - unsigned long start_mem = memory_start;
> - unsigned long end_mem = memory_end;
> + char buf[64];
>
> - end_mem &= PAGE_MASK;
> - high_memory = (void *)end_mem;
> -
> - start_mem = PAGE_ALIGN(start_mem);
> - max_mapnr = num_physpages = MAP_NR(high_memory);
> - printk(KERN_DEBUG "Kernel managed physical pages: %lu\n",
> num_physpages);
> + high_memory = (void *)(memory_end & PAGE_MASK);
> + max_mapnr = MAP_NR(high_memory);
> + printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", max_mapnr);
>
> /* This will put all low memory onto the freelists. */
> free_all_bootmem();
>
> - reservedpages = 0;
> - for (tmp = ARCH_PFN_OFFSET; tmp < max_mapnr; tmp++)
> - if (PageReserved(pfn_to_page(tmp)))
> - reservedpages++;
> - freepages = max_mapnr - ARCH_PFN_OFFSET - reservedpages;
> -
> - /* do not count in kernel image between _rambase and _ramstart */
> - reservedpages -= (_ramstart - _rambase) >> PAGE_SHIFT;
> -#if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263)
> - reservedpages += (_ramend - memory_end - DMA_UNCACHED_REGION) >>
> PAGE_SHIFT;
> -#endif
> -
> - codek = (_etext - _stext) >> 10;
> - initk = (__init_end - __init_begin) >> 10;
> - datak = ((_ramstart - _rambase) >> 10) - codek - initk;
> -
> - printk(KERN_INFO
> - "Memory available: %luk/%luk RAM, "
> - "(%uk init code, %uk kernel code, %uk data, %uk dma, %uk
> reserved)\n",
> - (unsigned long) freepages << (PAGE_SHIFT-10), (_ramend -
> CONFIG_PHY_RAM_BASE_ADDRESS) >> 10,
> - initk, codek, datak, DMA_UNCACHED_REGION >> 10,
> (reservedpages << (PAGE_SHIFT-10)));
You can't remove all these memory information for blackfin. They are
useful on blackfin platform.
Regards,
Sonic
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