[TRIVIAL] ppc64 shmget() translation bugfix

From: David Gibson (david_at_gibson.dropbear.id.au)
Date: 04/30/04

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    Date:	Fri, 30 Apr 2004 15:33:43 +1000
To: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>

    Linus, please apply:

    The 32->64 bit syscall translation layer on ppc64 incorrectly
    sign-extends rather than zero-extending the second parameter to
    shmget(), which should be a size_t. This means that it is impossible
    to shmget() more 2GB or more from a 32-bit process.

    Index: working-2.6/arch/ppc64/kernel/sys_ppc32.c
    ===================================================================
    --- working-2.6.orig/arch/ppc64/kernel/sys_ppc32.c 2004-03-31 11:10:09.000000000 +1000
    +++ working-2.6/arch/ppc64/kernel/sys_ppc32.c 2004-04-30 15:18:51.421878128 +1000
    @@ -1666,7 +1666,7 @@
                     err = sys_shmdt((char *)AA(ptr));
                     break;
             case SHMGET:
    - err = sys_shmget(first, second, third);
    + err = sys_shmget(first, second_parm, third);
                     break;
             case SHMCTL:
                     err = do_sys32_shmctl(first, second, (void *)AA(ptr)); 

    -- 
David Gibson			| For every complex problem there is a
david AT gibson.dropbear.id.au	| solution which is simple, neat and
				| wrong.
http://www.ozlabs.org/people/dgibson
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