author: Jordy Zomer <jordy@jordyzomer.github.io> 2021-09-07 19:56:18 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2021-09-08 11:50:24 -0700
commit: 110860541f443f950c1274f217a1a3e298670a33
parent: 41c961b9013ee9b6d0491f6926df546e37964b1f
Commit Summary:
Diffstat:
1 file changed, 5 insertions, 4 deletions
diff --git a/mm/secretmem.c b/mm/secretmem.c
index 030f02ddc7c1..1fea68b8d5a6 100644
--- a/mm/secretmem.c
+++ b/mm/secretmem.c
@@ -18,6 +18,7 @@
#include <linux/secretmem.h>
#include <linux/set_memory.h>
#include <linux/sched/signal.h>
+#include <linux/refcount.h>
#include <uapi/linux/magic.h>
@@ -40,11 +41,11 @@ module_param_named(enable, secretmem_enable, bool, 0400);
MODULE_PARM_DESC(secretmem_enable,
"Enable secretmem and memfd_secret(2) system call");
-static atomic_t secretmem_users;
+static refcount_t secretmem_users;
bool secretmem_active(void)
{
- return !!atomic_read(&secretmem_users);
+ return !!refcount_read(&secretmem_users);
}
static vm_fault_t secretmem_fault(struct vm_fault *vmf)
@@ -103,7 +104,7 @@ static const struct vm_operations_struct secretmem_vm_ops = {
static int secretmem_release(struct inode *inode, struct file *file)
{
- atomic_dec(&secretmem_users);
+ refcount_dec(&secretmem_users);
return 0;
}
@@ -217,7 +218,7 @@ SYSCALL_DEFINE1(memfd_secret, unsigned int, flags)
file->f_flags |= O_LARGEFILE;
fd_install(fd, file);
- atomic_inc(&secretmem_users);
+ refcount_inc(&secretmem_users);
return fd;
err_put_fd: