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mips/mm: Convert to using lock_mm_and_find_vma()

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commit 4bce37a68f upstream.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Samuel Mendoza-Jonas <samjonas@amazon.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Hutchings 2023-06-22 18:47:40 +02:00 committed by Greg Kroah-Hartman
parent 82972ea17b
commit 7227d70acc
2 changed files with 3 additions and 10 deletions
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1
arch/mips/Kconfig
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@ -94,6 +94,7 @@ config MIPS
select HAVE_VIRT_CPU_ACCOUNTING_GEN if 64BIT || !SMP
select IRQ_FORCED_THREADING
select ISA if EISA
select LOCK_MM_AND_FIND_VMA
select MODULES_USE_ELF_REL if MODULES
select MODULES_USE_ELF_RELA if MODULES && 64BIT
select PERF_USE_VMALLOC

12
arch/mips/mm/fault.c
View File

@ -99,21 +99,13 @@ static void __do_page_fault(struct pt_regs *regs, unsigned long write,
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
retry:
mmap_read_lock(mm);
vma = find_vma(mm, address);
vma = lock_mm_and_find_vma(mm, address, regs);
if (!vma)
goto bad_area;
if (vma->vm_start <= address)
goto good_area;
if (!(vma->vm_flags & VM_GROWSDOWN))
goto bad_area;
if (expand_stack(vma, address))
goto bad_area;
goto bad_area_nosemaphore;
/*
* Ok, we have a good vm_area for this memory access, so
* we can handle it..
*/
good_area:
si_code = SEGV_ACCERR;
if (write) {