* [PATCH bpf-next v6 1/4] uaccess: Define pagefault lock guard
[not found] <cover.1750402154.git.vmalik@redhat.com>
@ 2025-06-20 11:52 ` Viktor Malik
0 siblings, 0 replies; only message in thread
From: Viktor Malik @ 2025-06-20 11:52 UTC (permalink / raw)
To: bpf
Cc: Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko,
Martin KaFai Lau, Eduard Zingerman, Song Liu, Yonghong Song,
John Fastabend, KP Singh, Stanislav Fomichev, Hao Luo, Jiri Olsa,
linux-kernel, Viktor Malik
Define a pagefault lock guard which allows to simplify functions that
need to disable page faults.
Signed-off-by: Viktor Malik <vmalik@redhat.com>
---
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
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