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Revision 2a4c92fa24e1853d0e21f9e6e45859b832240f94 authored by Jeremy Fitzhardinge on 02 December 2010, 23:30:06 UTC, committed by Jeremy Fitzhardinge on 02 December 2010, 23:30:06 UTC 
xen: prevent crashes with non-HIGHMEM 32-bit kernels with largeish memory
 
If this is a non-HIGHMEM 32-bit kernel, then the page structures only go
up to the limit of addressable memory, even if more memory is physically
present.  Don't try to add that extra memory to the balloon.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
1 parent bc15fde
Raw File
syscall.c 
/*
 * arch/xtensa/kernel/syscall.c
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2005 Tensilica Inc.
 * Copyright (C) 2000 Silicon Graphics, Inc.
 * Copyright (C) 1995 - 2000 by Ralf Baechle
 *
 * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
 * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
 * Chris Zankel <chris@zankel.net>
 * Kevin Chea
 *
 */
#include <asm/uaccess.h>
#include <asm/syscall.h>
#include <asm/unistd.h>
#include <linux/linkage.h>
#include <linux/stringify.h>
#include <linux/errno.h>
#include <linux/syscalls.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/mman.h>
#include <linux/shm.h>

typedef void (*syscall_t)(void);

syscall_t sys_call_table[__NR_syscall_count] /* FIXME __cacheline_aligned */= {
	[0 ... __NR_syscall_count - 1] = (syscall_t)&sys_ni_syscall,

#undef __SYSCALL
#define __SYSCALL(nr,symbol,nargs) [ nr ] = (syscall_t)symbol,
#undef _XTENSA_UNISTD_H
#undef  __KERNEL_SYSCALLS__
#include <asm/unistd.h>
};

asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg)
{
	unsigned long ret;
	long err;

	err = do_shmat(shmid, shmaddr, shmflg, &ret);
	if (err)
		return err;
	return (long)ret;
}

asmlinkage long xtensa_fadvise64_64(int fd, int advice, unsigned long long offset, unsigned long long len)
{
	return sys_fadvise64_64(fd, offset, len, advice);
}
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