add formats for dentry/file pathnames

[karo-tx-linux.git] / Documentation / printk-formats.txt

diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt
index 3e8cb73ac43c2be41b7537c156f7d87a1efbba90..9552a3299ec9a2e27e88db91482b41c30c9de24e 100644 (file)
--- a/Documentation/printk-formats.txt
+++ b/Documentation/printk-formats.txt
@@ -168,6 +168,15 @@ UUID/GUID addresses:
        Where no additional specifiers are used the default little endian
        order with lower case hex characters will be printed.
 
+dentry names:
+       %pd{,2,3,4}
+       %pD{,2,3,4}
+
+       For printing dentry name; if we race with d_move(), the name might be
+       a mix of old and new ones, but it won't oops.  %pd dentry is a safer
+       equivalent of %s dentry->d_name.name we used to use, %pd<n> prints
+       n last components.  %pD does the same thing for struct file.
+
 struct va_format:
 
        %pV