diff mbox series

[v2,07/22] arch/mips/kernel/traps: Use vma_lookup() instead of find_vma()

Message ID 20210521174745.2219620-8-Liam.Howlett@Oracle.com (mailing list archive)
State New, archived
Headers show
Series mm: Add vma_lookup() | expand

Commit Message

Liam R. Howlett May 21, 2021, 5:48 p.m. UTC 
Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
---
 arch/mips/kernel/traps.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 0b4e06303c55..6f07362de5ce 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -784,7 +784,6 @@  void force_fcr31_sig(unsigned long fcr31, void __user *fault_addr,
 int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
 {
 	int si_code;
-	struct vm_area_struct *vma;
 
 	switch (sig) {
 	case 0:
@@ -800,8 +799,7 @@  int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
 
 	case SIGSEGV:
 		mmap_read_lock(current->mm);
-		vma = find_vma(current->mm, (unsigned long)fault_addr);
-		if (vma && (vma->vm_start <= (unsigned long)fault_addr))
+		if (vma_lookup(current->mm, (unsigned long)fault_addr))
 			si_code = SEGV_ACCERR;
 		else
 			si_code = SEGV_MAPERR;