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From: Will Deacon <will@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org,
	Will Deacon <will@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Jan Kara <jack@suse.cz>, Minchan Kim <minchan@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Vinayak Menon <vinmenon@codeaurora.org>,
	Hugh Dickins <hughd@google.com>,
	kernel-team@android.com
Subject: [RFC PATCH 8/8] mm: Mark 'info' field of 'struct vm_fault' as 'const'
Date: Thu, 14 Jan 2021 17:59:34 +0000	[thread overview]
Message-ID: <20210114175934.13070-9-will@kernel.org> (raw)
In-Reply-To: <20210114175934.13070-1-will@kernel.org>

The field is only ever read after being initialised, so mark it 'const'
before somebody tries to modify it again.

Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Will Deacon <will@kernel.org>
---
 include/linux/mm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index c24dd17b32c5..b45a8e075f7f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -521,7 +521,7 @@ struct vm_fault_info {
 };
 
 struct vm_fault {
-	struct vm_fault_info info;
+	const struct vm_fault_info info;
 	unsigned int flags;		/* FAULT_FLAG_xxx flags
 					 * XXX: should be in vm_fault_info */
 	pmd_t *pmd;			/* Pointer to pmd entry matching
-- 
2.30.0.284.gd98b1dd5eaa7-goog


      parent reply	other threads:[~2021-01-14 18:02 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-14 17:59 [PATCH v3 0/8] Create 'old' ptes for faultaround mappings on arm64 with hardware access flag Will Deacon
2021-01-14 17:59 ` [PATCH v3 1/8] mm: Cleanup faultaround and finish_fault() codepaths Will Deacon
2021-02-09 20:24   ` Guenter Roeck
2021-02-10 11:44     ` Will Deacon
2021-02-10 14:57       ` Guenter Roeck
2021-01-14 17:59 ` [PATCH v3 2/8] mm: Allow architectures to request 'old' entries when prefaulting Will Deacon
2021-01-14 17:59 ` [PATCH v3 3/8] arm64: mm: Implement arch_wants_old_prefaulted_pte() Will Deacon
2021-01-14 17:59 ` [RFC PATCH 4/8] mm: Separate fault info out of 'struct vm_fault' Will Deacon
2021-01-14 18:16   ` Linus Torvalds
2021-01-14 19:00     ` Will Deacon
2021-01-14 19:09       ` Linus Torvalds
2021-01-14 19:41         ` Will Deacon
2021-01-14 20:09           ` Nick Desaulniers
2021-01-14 21:11           ` Linus Torvalds
2021-01-15  9:23             ` Will Deacon
2021-01-15 21:32               ` Linus Torvalds
2021-01-20  0:00                 ` Nick Desaulniers
2021-01-14 17:59 ` [RFC PATCH 5/8] mm: Pass 'address' to map to do_set_pte() and drop FAULT_FLAG_PREFAULT Will Deacon
2021-01-14 18:17   ` Linus Torvalds
2021-01-15 10:24     ` Will Deacon
2021-01-14 17:59 ` [RFC PATCH 6/8] mm: Avoid modifying vmf.info.address in __collapse_huge_page_swapin() Will Deacon
2021-01-14 17:59 ` [RFC PATCH 7/8] mm: Use static initialisers for 'info' field of 'struct vm_fault' Will Deacon
2021-01-14 17:59 ` Will Deacon [this message]

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