target/linux/bcm27xx/patches-5.4/950-0435-arm64-rename-variables-used-to-calculate-ZONE_DMA32-.patch

   1 From 4d2bd7f66bac81b042afc2a6e742bd776a5a3938 Mon Sep 17 00:00:00 2001
   2 From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
   3 Date: Wed, 11 Sep 2019 20:25:44 +0200
   4 Subject: [PATCH] arm64: rename variables used to calculate
   5  ZONE_DMA32's size
   6
   7 commit a573cdd7973dedd87e62196c400332896bb236c8 upstream.
   8
   9 Let the name indicate that they are used to calculate ZONE_DMA32's size
  10 as opposed to ZONE_DMA.
  11
  12 Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
  13 Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
  14 Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
  15 ---
  16  arch/arm64/mm/init.c | 30 +++++++++++++++---------------
  17  1 file changed, 15 insertions(+), 15 deletions(-)
  18
  19 --- a/arch/arm64/mm/init.c
  20 +++ b/arch/arm64/mm/init.c
  21 @@ -50,7 +50,7 @@
  22  s64 memstart_addr __ro_after_init = -1;
  23  EXPORT_SYMBOL(memstart_addr);
  24
  25 -phys_addr_t arm64_dma_phys_limit __ro_after_init;
  26 +phys_addr_t arm64_dma32_phys_limit __ro_after_init;
  27
  28  #ifdef CONFIG_KEXEC_CORE
  29  /*
  30 @@ -168,7 +168,7 @@ static void __init reserve_elfcorehdr(vo
  31   * currently assumes that for memory starting above 4G, 32-bit devices will
  32   * use a DMA offset.
  33   */
  34 -static phys_addr_t __init max_zone_dma_phys(void)
  35 +static phys_addr_t __init max_zone_dma32_phys(void)
  36  {
  37         phys_addr_t offset = memblock_start_of_DRAM() & GENMASK_ULL(63, 32);
  38         return min(offset + (1ULL << 32), memblock_end_of_DRAM());
  39 @@ -181,7 +181,7 @@ static void __init zone_sizes_init(unsig
  40         unsigned long max_zone_pfns[MAX_NR_ZONES]  = {0};
  41
  42  #ifdef CONFIG_ZONE_DMA32
  43 -       max_zone_pfns[ZONE_DMA32] = PFN_DOWN(arm64_dma_phys_limit);
  44 +       max_zone_pfns[ZONE_DMA32] = PFN_DOWN(arm64_dma32_phys_limit);
  45  #endif
  46         max_zone_pfns[ZONE_NORMAL] = max;
  47
  48 @@ -194,16 +194,16 @@ static void __init zone_sizes_init(unsig
  49  {
  50         struct memblock_region *reg;
  51         unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
  52 -       unsigned long max_dma = min;
  53 +       unsigned long max_dma32 = min;
  54
  55         memset(zone_size, 0, sizeof(zone_size));
  56
  57         /* 4GB maximum for 32-bit only capable devices */
  58  #ifdef CONFIG_ZONE_DMA32
  59 -       max_dma = PFN_DOWN(arm64_dma_phys_limit);
  60 -       zone_size[ZONE_DMA32] = max_dma - min;
  61 +       max_dma32 = PFN_DOWN(arm64_dma32_phys_limit);
  62 +       zone_size[ZONE_DMA32] = max_dma32 - min;
  63  #endif
  64 -       zone_size[ZONE_NORMAL] = max - max_dma;
  65 +       zone_size[ZONE_NORMAL] = max - max_dma32;
  66
  67         memcpy(zhole_size, zone_size, sizeof(zhole_size));
  68
  69 @@ -215,14 +215,14 @@ static void __init zone_sizes_init(unsig
  70                         continue;
  71
  72  #ifdef CONFIG_ZONE_DMA32
  73 -               if (start < max_dma) {
  74 -                       unsigned long dma_end = min(end, max_dma);
  75 +               if (start < max_dma32) {
  76 +                       unsigned long dma_end = min(end, max_dma32);
  77                         zhole_size[ZONE_DMA32] -= dma_end - start;
  78                 }
  79  #endif
  80 -               if (end > max_dma) {
  81 +               if (end > max_dma32) {
  82                         unsigned long normal_end = min(end, max);
  83 -                       unsigned long normal_start = max(start, max_dma);
  84 +                       unsigned long normal_start = max(start, max_dma32);
  85                         zhole_size[ZONE_NORMAL] -= normal_end - normal_start;
  86                 }
  87         }
  88 @@ -422,9 +422,9 @@ void __init arm64_memblock_init(void)
  89
  90         /* 4GB maximum for 32-bit only capable devices */
  91         if (IS_ENABLED(CONFIG_ZONE_DMA32))
  92 -               arm64_dma_phys_limit = max_zone_dma_phys();
  93 +               arm64_dma32_phys_limit = max_zone_dma32_phys();
  94         else
  95 -               arm64_dma_phys_limit = PHYS_MASK + 1;
  96 +               arm64_dma32_phys_limit = PHYS_MASK + 1;
  97
  98         reserve_crashkernel();
  99
 100 @@ -432,7 +432,7 @@ void __init arm64_memblock_init(void)
 101
 102         high_memory = __va(memblock_end_of_DRAM() - 1) + 1;
 103
 104 -       dma_contiguous_reserve(arm64_dma_phys_limit);
 105 +       dma_contiguous_reserve(arm64_dma32_phys_limit);
 106  }
 107
 108  void __init bootmem_init(void)
 109 @@ -536,7 +536,7 @@ static void __init free_unused_memmap(vo
 110  void __init mem_init(void)
 111  {
 112         if (swiotlb_force == SWIOTLB_FORCE ||
 113 -           max_pfn > (arm64_dma_phys_limit >> PAGE_SHIFT))
 114 +           max_pfn > (arm64_dma32_phys_limit >> PAGE_SHIFT))
 115                 swiotlb_init(1);
 116         else
 117                 swiotlb_force = SWIOTLB_NO_FORCE;