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-rw-r--r--docs/sigaction.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/docs/sigaction.txt b/docs/sigaction.txt
index b380e725b..667eeba41 100644
--- a/docs/sigaction.txt
+++ b/docs/sigaction.txt
@@ -242,4 +242,8 @@ To this effect:
* Document discovered arch quirks while debugging this mess.
-* Deal with old_kernel_sigaction later.
+* struct old_kernel_sigaction can't be disposed of in a similar way,
+ we need to have userspace struct sigaction unchanged regardless
+ whether we use "old" or "new" kernel sigaction() syscall.
+ It's moot anyway because "old" one is long unused, it's from
+ pre-2.2 kernels.