From: Viktor Malik <vmalik@redhat.com>
Date: Thu, 26 Jun 2025 06:08:28 +0000 (+0200)
Subject: uaccess: Define pagefault lock guard
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3a95a561f2763e3854e207de3ea821e795a1f1e0;p=thirdparty%2Flinux.git

uaccess: Define pagefault lock guard

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

Signed-off-by: Viktor Malik <vmalik@redhat.com>
Link: https://lore.kernel.org/r/8a01beb0b671923976f08297d81242bb2129881d.1750917800.git.vmalik@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 7c06f47956704..1beb5b395d81d 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
 
 /**