diff mbox series

[v3,31/66] arch/xtensa: Use maple tree iterators for unmapped area

Message ID 20211005012959.1110504-32-Liam.Howlett@oracle.com (mailing list archive)
State New
Headers show
Series Introducing the Maple Tree | expand

Commit Message

Liam R. Howlett Oct. 5, 2021, 1:30 a.m. UTC 
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 arch/xtensa/kernel/syscall.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c
index 201356faa7e6..118fe0ca7594 100644
--- a/arch/xtensa/kernel/syscall.c
+++ b/arch/xtensa/kernel/syscall.c
@@ -58,6 +58,7 @@  unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 		unsigned long len, unsigned long pgoff, unsigned long flags)
 {
 	struct vm_area_struct *vmm;
+	MA_STATE(mas, &mm->mm_mt, addr, addr);
 
 	if (flags & MAP_FIXED) {
 		/* We do not accept a shared mapping if it would violate
@@ -79,7 +80,8 @@  unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 	else
 		addr = PAGE_ALIGN(addr);
 
-	for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
+	/* Must hold mm_mt lock */
+	mas_for_each(&mas, vmm, ULONG_MAX) {
 		/* At this point:  (!vmm || addr < vmm->vm_end). */
 		if (TASK_SIZE - len < addr)
 			return -ENOMEM;