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[RFC,8/8] mm: Mark 'info' field of 'struct vm_fault' as 'const'

Message ID 20210114175934.13070-9-will@kernel.org (mailing list archive)
State New, archived
Headers show
Series Create 'old' ptes for faultaround mappings on arm64 with hardware access flag | expand

Commit Message

Will Deacon Jan. 14, 2021, 5:59 p.m. UTC
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(-)
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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