0707ad30d1
This commit is primarily changes caused by reviewing "sparse" and "checkpatch" output on our sources, so is somewhat noisy, since things like "printk() -> pr_err()" (or whatever) throughout the codebase tend to get tedious to read. Rather than trying to tease apart precisely which things changed due to which type of code review, this commit includes various cleanups in the code: - sparse: Add declarations in headers for globals. - sparse: Fix __user annotations. - sparse: Using gfp_t consistently instead of int. - sparse: removing functions not actually used. - checkpatch: Clean up printk() warnings by using pr_info(), etc.; also avoid partial-line printks except in bootup code. - checkpatch: Use exposed structs rather than typedefs. - checkpatch: Change some C99 comments to C89 comments. In addition, a couple of minor other changes are rolled in to this commit: - Add support for a "raise" instruction to cause SIGFPE, etc., to be raised. - Remove some compat code that is unnecessary when we fully eliminate some of the deprecated syscalls from the generic syscall ABI. - Update the tile_defconfig to reflect current config contents. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*
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* This file contains various random system calls that
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* have a non-standard calling sequence on the Linux/TILE
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* platform.
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/syscalls.h>
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#include <linux/mman.h>
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#include <linux/file.h>
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#include <linux/mempolicy.h>
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#include <linux/binfmts.h>
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#include <linux/fs.h>
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#include <linux/compat.h>
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#include <linux/uaccess.h>
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#include <linux/signal.h>
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#include <asm/syscalls.h>
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#include <asm/pgtable.h>
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#include <asm/homecache.h>
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#include <arch/chip.h>
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SYSCALL_DEFINE0(flush_cache)
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{
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homecache_evict(cpumask_of(smp_processor_id()));
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return 0;
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}
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/*
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* Syscalls that pass 64-bit values on 32-bit systems normally
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* pass them as (low,high) word packed into the immediately adjacent
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* registers. If the low word naturally falls on an even register,
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* our ABI makes it work correctly; if not, we adjust it here.
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* Handling it here means we don't have to fix uclibc AND glibc AND
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* any other standard libcs we want to support.
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*/
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#if !defined(__tilegx__) || defined(CONFIG_COMPAT)
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ssize_t sys32_readahead(int fd, u32 offset_lo, u32 offset_hi, u32 count)
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{
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return sys_readahead(fd, ((loff_t)offset_hi << 32) | offset_lo, count);
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}
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long sys32_fadvise64(int fd, u32 offset_lo, u32 offset_hi,
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u32 len, int advice)
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{
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return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo,
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len, advice);
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}
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int sys32_fadvise64_64(int fd, u32 offset_lo, u32 offset_hi,
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u32 len_lo, u32 len_hi, int advice)
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{
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return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo,
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((loff_t)len_hi << 32) | len_lo, advice);
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}
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#endif /* 32-bit syscall wrappers */
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/* Note: used by the compat code even in 64-bit Linux. */
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SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
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unsigned long, prot, unsigned long, flags,
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unsigned long, fd, unsigned long, off_4k)
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{
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#define PAGE_ADJUST (PAGE_SHIFT - 12)
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if (off_4k & ((1 << PAGE_ADJUST) - 1))
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return -EINVAL;
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return sys_mmap_pgoff(addr, len, prot, flags, fd,
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off_4k >> PAGE_ADJUST);
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}
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#ifdef __tilegx__
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SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
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unsigned long, prot, unsigned long, flags,
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unsigned long, fd, off_t, offset)
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{
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if (offset & ((1 << PAGE_SHIFT) - 1))
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return -EINVAL;
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return sys_mmap_pgoff(addr, len, prot, flags, fd,
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offset >> PAGE_SHIFT);
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}
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#endif
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/* Provide the actual syscall number to call mapping. */
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#undef __SYSCALL
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#define __SYSCALL(nr, call) [nr] = (call),
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#ifndef __tilegx__
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/* See comments at the top of the file. */
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#define sys_fadvise64 sys32_fadvise64
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#define sys_fadvise64_64 sys32_fadvise64_64
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#define sys_readahead sys32_readahead
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#define sys_sync_file_range sys_sync_file_range2
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#endif
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/*
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* Note that we can't include <linux/unistd.h> here since the header
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* guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
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*/
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void *sys_call_table[__NR_syscalls] = {
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[0 ... __NR_syscalls-1] = sys_ni_syscall,
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#include <asm/unistd.h>
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};
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