[Bug 11800] building SES support fails w/ gcc-3.4.5

[bugme-daemon@bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=11800





------- Comment #3 from anonymous@kernel-bugs.osdl.org  2008-10-22 13:31 -------
Reply-To: akpm@linux-foundation.org

On Wed, 22 Oct 2008 15:43:05 -0400
Marc Bejarano <beej@alum.mit.edu> wrote:

> At 18:52 10/21/2008, Andrew Morton wrote:
>  >On Tue, 21 Oct 2008 11:36:12 -0700 (PDT)
>  >bugme-daemon@bugzilla.kernel.org wrote:
>  >
>  >> http://bugzilla.kernel.org/show_bug.cgi?id=11800
>  >>
>  >>            Summary: building SES support fails w/ gcc-3.4.5
>  >>            Product: SCSI Drivers
>  >>            Version: 2.5
>  >>      KernelVersion: 2.6.27.1
>  >>           Platform: All
>  >>         OS/Version: Linux
>  >>               Tree: Mainline
>  >>             Status: NEW
>  >>           Severity: normal
>  >>           Priority: P1
>  >>          Component: Other
>  >>         AssignedTo: scsi_drivers-other@kernel-bugs.osdl.org
>  >>         ReportedBy: bugzilla.kernel.org@beej.org
>  >>
>  >>
>  >> [beej@dell ~]$ cat /etc/redhat-release
>  >> CentOS release 4.3 (Final)
>  >> [beej@dell ~]$ rpm -qf `which gcc`
>  >> gcc-3.4.5-2
>  >> [beej@dell linux-2.6.27.1]$ diff .config .config.old
>  >> 4c4
>  >> < # Tue Oct 21 14:07:00 2008
>  >> ---
>  >> > # Thu Oct 16 17:54:42 2008
>  >> 1006c1006
>  >> < # CONFIG_SCSI_ENCLOSURE is not set
>  >> ---
>  >> > CONFIG_SCSI_ENCLOSURE=m
>  >>
>  >> using .config.old,
>  >> [beej@dell linux-2.6.27.1]$ make
>  >> <snip>
>  >> Kernel: arch/x86/boot/bzImage is ready  (#2)
>  >>   Building modules, stage 2.
>  >>   MODPOST 668 modules
>  >> ERROR: "__you_cannot_kmalloc_that_much" [drivers/scsi/ses.ko] undefined!
>  >> make[1]: *** [__modpost] Error 1
>  >> make: *** [modules] Error 2
>  >>
>  >
>  >That's weird.  It means that we did a kmalloc(N, ...) where the value
>  >of N is known at compile time, and N is too large.
>  >
>  >But I can find no such kmalloc/kzalloc calls in ses.c.  It might be gcc
>  >bustage - we've seen that before.
>  >
>  >Please do
>  >
>  >	make drivers/scsi/ses.s
>  >
>  >then have a look in drivers/scsi/ses.s and see which function is
>  >emitting a call to __you_cannot_kmalloc_that_much.  Or email me
>  >drivers/scsi/ses.s and I'll take a look.
> 
> attached
> 

OK, it's here:

        buf = kmalloc(vpd_len, GFP_KERNEL);

it's a gcc bug.

Please see if you can find some way to make it go away - perhaps change
vpd_len's type to `int', things like that.

Or use a different compiler version :(


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