This is a note to let you know that I've just added the patch titled
arch/arm64/mm/fault: Fix undeclared variable error in do_page_fault()
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arch-arm64-mm-fault-fix-undeclared-variable-error-in-do_page_fault.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 24be4d0b46bb0c3c1dc7bacd30957d6144a70dfc Mon Sep 17 00:00:00 2001
From: SeongJae Park <sj@xxxxxxxxxx>
Date: Tue, 4 Jul 2023 01:00:03 +0000
Subject: arch/arm64/mm/fault: Fix undeclared variable error in do_page_fault()
From: SeongJae Park <sj@xxxxxxxxxx>
commit 24be4d0b46bb0c3c1dc7bacd30957d6144a70dfc upstream.
Commit ae870a68b5d1 ("arm64/mm: Convert to using
lock_mm_and_find_vma()") made do_page_fault() to use 'vma' even if
CONFIG_PER_VMA_LOCK is not defined, but the declaration is still in the
ifdef.
As a result, building kernel without the config fails with undeclared
variable error as below:
arch/arm64/mm/fault.c: In function 'do_page_fault':
arch/arm64/mm/fault.c:624:2: error: 'vma' undeclared (first use in this function); did you mean 'vmap'?
624 | vma = lock_mm_and_find_vma(mm, addr, regs);
| ^~~
| vmap
Fix it by moving the declaration out of the ifdef.
Fixes: ae870a68b5d1 ("arm64/mm: Convert to using lock_mm_and_find_vma()")
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/mm/fault.c | 2 --
1 file changed, 2 deletions(-)
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -522,9 +522,7 @@ static int __kprobes do_page_fault(unsig
unsigned long vm_flags;
unsigned int mm_flags = FAULT_FLAG_DEFAULT;
unsigned long addr = untagged_addr(far);
-#ifdef CONFIG_PER_VMA_LOCK
struct vm_area_struct *vma;
-#endif
if (kprobe_page_fault(regs, esr))
return 0;
Patches currently in stable-queue which might be from sj@xxxxxxxxxx are
queue-6.4/arch-arm64-mm-fault-fix-undeclared-variable-error-in-do_page_fault.patch
