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From: Michael Kerrisk <>
To: Nicolas George <>
Subject: Re: UML/man: BLKGETSIZE takes a long, not an int
Date: Mon, 27 Aug 2007 15:25:54 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hello Nicolas,

> I fear that my bug-report yesterday was very badly written, with me writing
> to the wrong mailing-list and all.
> I was saying:
>> I found a type mismatch in UML that makes host block devices unusable as ubd
>> devices on x86_64 and other 64 bits systems (segfault of the mm subsystem):
>> In block/ioctl.c, the following lines show that the BLKGETSIZE ioctl expects
>> a pointer to a long:
>> 	case BLKGETSIZE:
>> 		if ((bdev->bd_inode->i_size >> 9) > ~0UL)
>> 			return -EFBIG;
>> 		return put_ulong(arg, bdev->bd_inode->i_size >> 9);
>> In arch/um/os-Linux/file.c, os_file_size calls it with an int.
>> The ioctl_list man page should be fixed as well.

manual page changed for 2.65:

--- ioctl_list.2
+++ ioctl_list.2        (working copy)
@@ -243,7 +243,7 @@
 0x0000125D  BLKROSET                   const int *
 0x0000125E  BLKROGET                   int *
 0x0000125F  BLKRRPART                  void
-0x00001260  BLKGETSIZE                 int *
+0x00001260  BLKGETSIZE                 unsigned long *
 0x00001261  BLKFLSBUF                  void
 0x00001262  BLKRASET                   int
 0x00001263  BLKRAGET                   int *



Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7

Want to help with man page maintenance?  Grab the latest tarball at
read the HOWTOHELP file and grep the source files for 'FIXME'.

  reply	other threads:[~2007-08-27 13:27 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-14  9:29 Nicolas George
2007-08-27 13:25 ` Michael Kerrisk [this message]
  -- strict thread matches above, loose matches on Subject: below --
2007-08-13 12:42 UML/man: BLKGETSIZE takes a long, not an int Nicolas George
2007-08-15 17:12 ` Jeff Dike

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