Patches for -bk/-mm4.

From: Martin Schwidefsky (schwidefsky_at_de.ibm.com)
Date: 06/30/04

  • Next message: Martin Schwidefsky: "[PATCH] 64 bit bug in radix-tree lookup." 
    Date:	Wed, 30 Jun 2004 19:06:45 +0200
To: akpm@osdl.org, linux-kernel@vger.kernel.org

    Hi Andrew,
    today I've 7 patches for you to consider. One is common code,
    6 are s390 bug fixes. I've another one which adds experimental
    cpu hotplug support for s390 which works on the -bk tree but
    not one the -mm4 tree. I could track it down to two patches
    in -mm4, if I remove sched-cleanup-improve-sched-fork-apis.patch
    and sched-cleanup-init_idle.patch the hotplugging works on -mm4.
    I'll have to investigate further what's wrong here.

    The common code problem is in lib/radix-tree.c where an int
    is shifted by more then 32 bits. We stumbled over this problem
    with the efi partition code. After a dasd device is freshly
    formatted it has 0 blocks. The efi partition code tries to load
    the last block of the device which turns out to number -1. A
    mapping for page at index (~0UL >> 3) related to a bdev inode
    is established. Due to the bug in the radix tree code the page
    isn't found when the bdev gets released and the nrpages counter
    stays 1 -> "kernel BUG() at fs/inode.c:238!".

    Have fun & blue skies,
      Martin.

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