On 08/02/20 at 07:35pm, Mike Rapoport wrote: > From: Mike Rapoport <rppt****@linux*****> > > The memory size calculation in cma_early_percent_memory() traverses > memblock.memory rather than simply call memblock_phys_mem_size(). The > comment in that function suggests that at some point there should have been > call to memblock_analyze() before memblock_phys_mem_size() could be used. > As of now, there is no memblock_analyze() at all and > memblock_phys_mem_size() can be used as soon as cold-plug memory is > registerd with memblock. > > Replace loop over memblock.memory with a call to memblock_phys_mem_size(). > > Signed-off-by: Mike Rapoport <rppt****@linux*****> > Reviewed-by: Christoph Hellwig <hch****@lst*****> > --- > kernel/dma/contiguous.c | 11 +---------- > 1 file changed, 1 insertion(+), 10 deletions(-) > > diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c > index 15bc5026c485..1992afd8ca7b 100644 > --- a/kernel/dma/contiguous.c > +++ b/kernel/dma/contiguous.c > @@ -73,16 +73,7 @@ early_param("cma", early_cma); > > static phys_addr_t __init __maybe_unused cma_early_percent_memory(void) > { > - struct memblock_region *reg; > - unsigned long total_pages = 0; > - > - /* > - * We cannot use memblock_phys_mem_size() here, because > - * memblock_analyze() has not been called yet. > - */ > - for_each_memblock(memory, reg) > - total_pages += memblock_region_memory_end_pfn(reg) - > - memblock_region_memory_base_pfn(reg); > + unsigned long total_pages = PHYS_PFN(memblock_phys_mem_size()); Reviewed-by: Baoquan He <bhe****@redha*****> > > return (total_pages * CONFIG_CMA_SIZE_PERCENTAGE / 100) << PAGE_SHIFT; > } > -- > 2.26.2 >
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