diff mbox series

[v3,34/66] fs/binfmt_elf: Use maple tree iterators for fill_files_note()

Message ID 20211005012959.1110504-35-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>
---
 fs/binfmt_elf.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 69d900a8473d..2954f5c5e87f 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1614,6 +1614,7 @@  static int fill_files_note(struct memelfnote *note)
 	user_long_t *data;
 	user_long_t *start_end_ofs;
 	char *name_base, *name_curpos;
+	MA_STATE(mas, &mm->mm_mt, 0, 0);
 
 	/* *Estimated* file count and total data size needed */
 	count = mm->map_count;
@@ -1638,7 +1639,8 @@  static int fill_files_note(struct memelfnote *note)
 	name_base = name_curpos = ((char *)data) + names_ofs;
 	remaining = size - names_ofs;
 	count = 0;
-	for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) {
+	rcu_read_lock();
+	mas_for_each(&mas, vma, ULONG_MAX) {
 		struct file *file;
 		const char *filename;
 
@@ -1667,6 +1669,7 @@  static int fill_files_note(struct memelfnote *note)
 		*start_end_ofs++ = vma->vm_pgoff;
 		count++;
 	}
+	rcu_read_unlock();
 
 	/* Now we know exact count of files, can store it */
 	data[0] = count;