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Diffstat (limited to 'arch/hexagon')
-rw-r--r--arch/hexagon/Kconfig1
-rw-r--r--arch/hexagon/mm/vm_fault.c18
2 files changed, 5 insertions, 14 deletions
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 54eadf265178..6726f4941015 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -28,6 +28,7 @@ config HEXAGON
select GENERIC_SMP_IDLE_THREAD
select STACKTRACE_SUPPORT
select GENERIC_CLOCKEVENTS_BROADCAST
+ select LOCK_MM_AND_FIND_VMA
select MODULES_USE_ELF_RELA
select GENERIC_CPU_DEVICES
select ARCH_WANT_LD_ORPHAN_WARN
diff --git a/arch/hexagon/mm/vm_fault.c b/arch/hexagon/mm/vm_fault.c
index 4b578d02fd01..7295ea3f8cc8 100644
--- a/arch/hexagon/mm/vm_fault.c
+++ b/arch/hexagon/mm/vm_fault.c
@@ -57,21 +57,10 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
retry:
- mmap_read_lock(mm);
- vma = find_vma(mm, address);
- if (!vma)
- goto bad_area;
+ vma = lock_mm_and_find_vma(mm, address, regs);
+ if (unlikely(!vma))
+ goto bad_area_nosemaphore;
- 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;
-
-good_area:
/* Address space is OK. Now check access rights. */
si_code = SEGV_ACCERR;
@@ -143,6 +132,7 @@ good_area:
bad_area:
mmap_read_unlock(mm);
+bad_area_nosemaphore:
if (user_mode(regs)) {
force_sig_fault(SIGSEGV, si_code, (void __user *)address);
return;