From 18b9c9403758ff68d93ee2f593096778d58e6f76 Mon Sep 17 00:00:00 2001 From: Serge Semin Date: Wed, 25 Nov 2020 10:26:40 +0300 Subject: mtd: physmap: physmap-bt1-rom: Fix __iomem addrspace removal warning sparse is unhappy with us casting the __iomem address space pointer to a type with no address space attribute specified: "sparse warnings: (new ones prefixed by >>)" >> drivers/mtd/maps/physmap-bt1-rom.c:78:18: sparse: sparse: cast removes address space '__iomem' of expression Indeed we perform the __iomem-less type casting but to an integer variable. The integer variable isn't dereferenced then, so the casting is safe and won't cause any problem. But in order to make sparse happy and keep the code coherent let's fix the warning by converting the local "shift" and "chunk" variables to the "unsigned int" type (since their value won't ever exceed three) and cast the __iomem-pointers to uintptr_t. Add the same fix to the bt1_rom_map_read() method for unification. Fixes: b3e79e7682e0 ("mtd: physmap: Add Baikal-T1 physically mapped ROM support") Link: https://lore.kernel.org/lkml/202011021254.XC70BaQT-lkp@intel.com/ Signed-off-by: Serge Semin Reported-by: kernel test robot Cc: Alexey Malahov Cc: Pavel Parkhomenko Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20201125072640.23516-1-Sergey.Semin@baikalelectronics.ru --- drivers/mtd/maps/physmap-bt1-rom.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/mtd/maps/physmap-bt1-rom.c b/drivers/mtd/maps/physmap-bt1-rom.c index 27cfe1c63a2e..a35450002284 100644 --- a/drivers/mtd/maps/physmap-bt1-rom.c +++ b/drivers/mtd/maps/physmap-bt1-rom.c @@ -31,12 +31,12 @@ static map_word __xipram bt1_rom_map_read(struct map_info *map, unsigned long ofs) { void __iomem *src = map->virt + ofs; - unsigned long shift; + unsigned int shift; map_word ret; u32 data; /* Read data within offset dword. */ - shift = (unsigned long)src & 0x3; + shift = (uintptr_t)src & 0x3; data = readl_relaxed(src - shift); if (!shift) { ret.x[0] = data; @@ -60,7 +60,7 @@ static void __xipram bt1_rom_map_copy_from(struct map_info *map, ssize_t len) { void __iomem *src = map->virt + from; - ssize_t shift, chunk; + unsigned int shift, chunk; u32 data; if (len <= 0 || from >= map->size) @@ -75,7 +75,7 @@ static void __xipram bt1_rom_map_copy_from(struct map_info *map, * up into the next three stages: unaligned head, aligned body, * unaligned tail. */ - shift = (ssize_t)src & 0x3; + shift = (uintptr_t)src & 0x3; if (shift) { chunk = min_t(ssize_t, 4 - shift, len); data = readl_relaxed(src - shift); -- cgit v1.2.3