linux-kernel - Re: [PATCH 7/7] mm/mremap: thread state through move page table operation

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Message-Id: <20250303160555.46915fd9f69ca13e1fe2c5f9@linux-foundation.org>
Date: Mon, 3 Mar 2025 16:05:55 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: kernel test robot <lkp@...el.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 oe-kbuild-all@...ts.linux.dev, Linux Memory Management List
 <linux-mm@...ck.org>, "Liam R . Howlett" <Liam.Howlett@...cle.com>,
 Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/7] mm/mremap: thread state through move page table
 operation

On Tue, 4 Mar 2025 07:30:16 +0800 kernel test robot <lkp@...el.com> wrote:

> Hi Lorenzo,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on akpm-mm/mm-everything]
> [also build test WARNING on linus/master v6.14-rc5 next-20250303]
> [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/Lorenzo-Stoakes/mm-mremap-correctly-handle-partial-mremap-of-VMA-starting-at-0/20250303-192101
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link:    https://lore.kernel.org/r/4cc18ebfc0cb32e9e42d86503cef3265108343e4.1740911247.git.lorenzo.stoakes%40oracle.com
> patch subject: [PATCH 7/7] mm/mremap: thread state through move page table operation
> config: x86_64-buildonly-randconfig-005-20250304 (https://download.01.org/0day-ci/archive/20250304/202503040759.5zpJdC2i-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/20250304/202503040759.5zpJdC2i-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/202503040759.5zpJdC2i-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
>    mm/mremap.c: In function 'move_pgt_entry':
>    mm/mremap.c:581:39: error: passing argument 1 of 'move_huge_pud' from incompatible pointer type [-Werror=incompatible-pointer-types]

Thanks.

--- a/mm/mremap.c~mm-mremap-thread-state-through-move-page-table-operation-fix
+++ a/mm/mremap.c
@@ -475,8 +475,9 @@ static bool move_huge_pud(struct pagetab
 	return true;
 }
 #else
-static bool move_huge_pud(struct vm_area_struct *vma, unsigned long old_addr,
-			  unsigned long new_addr, pud_t *old_pud, pud_t *new_pud)
+static bool move_huge_pud(struct pagetable_move_control *pmc,
+			  unsigned long old_addr, unsigned long new_addr,
+			  pud_t *old_pud, pud_t *new_pud)
 {
 	WARN_ON_ONCE(1);
 	return false;
_