systemd/SOURCES/0031-udev-node-simplify-the-example-of-race.patch
2021-12-09 15:29:41 +00:00

37 lines
1.8 KiB
Diff

From a5a14281160881fbb39d80a2572a18ecadbeedd5 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sun, 12 Sep 2021 16:05:51 +0900
Subject: [PATCH] udev-node: simplify the example of race
(cherry picked from commit 3df566a66723490914ef3bae0ca8046044b70dce)
Related: #1977994
---
src/udev/udev-node.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/src/udev/udev-node.c b/src/udev/udev-node.c
index bb551d86b0..61cb9a449b 100644
--- a/src/udev/udev-node.c
+++ b/src/udev/udev-node.c
@@ -272,14 +272,14 @@ static int update_timestamp(sd_device *dev, const char *path, struct stat *prev)
/* Even if a symlink in the stack directory is created/removed, the mtime of the directory may
* not be changed. Why? Let's consider the following situation. For simplicity, let's assume
- * there exist three udev workers (A, B, and C) and all of them calls link_update() for the
- * same devlink simultaneously.
+ * there exist two udev workers (A and B) and all of them calls link_update() for the same
+ * devlink simultaneously.
*
- * 1. B creates/removes a symlink in the stack directory.
+ * 1. A creates/removes a symlink in the stack directory.
* 2. A calls the first stat() in the loop of link_update().
* 3. A calls link_find_prioritized().
- * 4. C creates/removes another symlink in the stack directory, so the result of the step 3 is outdated.
- * 5. B and C finish link_update().
+ * 4. B creates/removes another symlink in the stack directory, so the result of the step 3 is outdated.
+ * 5. B finishes link_update().
* 6. A creates/removes devlink according to the outdated result in the step 3.
* 7. A calls the second stat() in the loop of link_update().
*