linux-kernel - Re: [PATCH 2/2] x86/mm: Make memremap(MEMREMAP

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Message-ID: <202410200112.Ut6HtXKD-lkp@intel.com>
Date: Sun, 20 Oct 2024 01:28:59 +0800
From: kernel test robot <lkp@...el.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>, Andy Lutomirski <luto@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, Albert Ou <aou@...s.berkeley.edu>,
	Alexei Starovoitov <ast@...nel.org>,
	Andrea Parri <parri.andrea@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	Daniel Borkmann <daniel@...earbox.net>,
	Eric Chan <ericchancf@...gle.com>, Jason Gunthorpe <jgg@...pe.ca>,
	Kai Huang <kai.huang@...el.com>,
	Kefeng Wang <wangkefeng.wang@...wei.com>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	Palmer Dabbelt <palmer@...osinc.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Russell King <linux@...linux.org.uk>,
	Samuel Holland <samuel.holland@...ive.com>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Yuntao Wang <ytcoode@...il.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Tom Lendacky <thomas.lendacky@....com>,
	Ashish Kalra <ashish.kalra@....com>,
	"Maciej W. Rozycki" <macro@...am.me.uk>
Subject: Re: [PATCH 2/2] x86/mm: Make memremap(MEMREMAP_WB) map memory as
 encrypted by default

Hi Kirill,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/master]
[also build test WARNING on tip/x86/mm linus/master tip/auto-latest tip/x86/core v6.12-rc3 next-20241018]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Kirill-A-Shutemov/memremap-Pass-down-MEMREMAP_-flags-to-arch_memremap_wb/20241018-001138
base:   tip/master
patch link:    https://lore.kernel.org/r/20241017155642.1942514-3-kirill.shutemov%40linux.intel.com
patch subject: [PATCH 2/2] x86/mm: Make memremap(MEMREMAP_WB) map memory as encrypted by default
config: i386-randconfig-061-20241019 (https://download.01.org/0day-ci/archive/20241020/202410200112.Ut6HtXKD-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241020/202410200112.Ut6HtXKD-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410200112.Ut6HtXKD-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/x86/mm/ioremap.c:509:37: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void * @@     got void [noderef] __iomem * @@
   arch/x86/mm/ioremap.c:509:37: sparse:     expected void *
   arch/x86/mm/ioremap.c:509:37: sparse:     got void [noderef] __iomem *
   arch/x86/mm/ioremap.c:511:33: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void * @@     got void [noderef] __iomem * @@
   arch/x86/mm/ioremap.c:511:33: sparse:     expected void *
   arch/x86/mm/ioremap.c:511:33: sparse:     got void [noderef] __iomem *

vim +509 arch/x86/mm/ioremap.c

   505	
   506	void *arch_memremap_wb(phys_addr_t phys_addr, size_t size, unsigned long flags)
   507	{
   508		if (flags & MEMREMAP_DEC)
 > 509			return ioremap_cache(phys_addr, size);
   510	
   511		return ioremap_encrypted(phys_addr, size);
   512	}
   513	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki