richard -rw- weinberger wrote at 19:00:35
> Can you bisect the issue?
tfoerste@n22 ~/devel/linux-2.6 $ git bisect bad
2e12978a9f7a7abd54e8eb9ce70a7718767b8b2c is the first bad commit
commit 2e12978a9f7a7abd54e8eb9ce70a7718767b8b2c
Author: Lai Jiangshan <[email protected]>
Date: Wed Dec 22 14:18:50 2010 +0800
futex,plist: Pass the real head of the priority list to plist_del()
Some plist_del()s in kernel/futex.c are passed a faked head of the
priority list.
It does not fail because the current code does not require the real head
in plist_del(). The current code of plist_del() just uses the head for
checking,
so it will not cause a bad result even when we use a faked head.
But it is undocumented usage:
/**
* plist_del - Remove a @node from plist.
*
* @node: &struct plist_node pointer - entry to be removed
* @head: &struct plist_head pointer - list head
*/
The document says that the @head is the "list head" head of the priority
list.
In futex code, several places use "plist_del(&q->list, &q->list.plist);",
they pass a fake head. We need to fix them all.
Thanks to Darren Hart for many suggestions.
Acked-by: Darren Hart <[email protected]>
Signed-off-by: Lai Jiangshan <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
:040000 040000 78d47de377f8da1c131007a17ca915fbd13f7ff6
ffac93205aaf22fda0667d6395c8da7c7bf692e4 M kernel
--
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
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