[PATCH bpf-next v6 1/4] uaccess: Define pagefault lock guard

[Viktor Malik]

Define a pagefault lock guard which allows to simplify functions that
need to disable page faults.

Signed-off-by: Viktor Malik <vmalik@xxxxxxxxxx>
---
 include/linux/uaccess.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 7c06f4795670..1beb5b395d81 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -296,6 +296,8 @@ static inline bool pagefault_disabled(void)
  */
 #define faulthandler_disabled() (pagefault_disabled() || in_atomic())
 
+DEFINE_LOCK_GUARD_0(pagefault, pagefault_disable(), pagefault_enable())
+
 #ifndef CONFIG_ARCH_HAS_SUBPAGE_FAULTS
 
 /**
-- 
2.49.0