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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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5cacdb4add
Add generic implementations of the old and really old uname system calls. Note that sh only implements sys_olduname but not sys_oldolduname, but I'm not going to bother with another ifdef for that special case. m32r implemented an old uname but never wired it up, so kill it, too. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: James Morris <jmorris@namei.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
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* linux/arch/sh/kernel/sys_sh.c
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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/SuperH
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* platform.
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*
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* Taken from i386 version.
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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/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/stat.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/utsname.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/ipc.h>
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#include <asm/syscalls.h>
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#include <asm/uaccess.h>
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#include <asm/unistd.h>
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#include <asm/cacheflush.h>
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#include <asm/cachectl.h>
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asmlinkage int old_mmap(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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int fd, unsigned long off)
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{
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if (off & ~PAGE_MASK)
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return -EINVAL;
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return sys_mmap_pgoff(addr, len, prot, flags, fd, off>>PAGE_SHIFT);
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}
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asmlinkage long sys_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 pgoff)
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{
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/*
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* The shift for mmap2 is constant, regardless of PAGE_SIZE
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* setting.
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*/
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if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))
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return -EINVAL;
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pgoff >>= PAGE_SHIFT - 12;
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return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
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}
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/* sys_cacheflush -- flush (part of) the processor cache. */
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asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
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{
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struct vm_area_struct *vma;
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if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
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return -EINVAL;
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/*
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* Verify that the specified address region actually belongs
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* to this process.
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*/
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if (addr + len < addr)
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return -EFAULT;
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down_read(¤t->mm->mmap_sem);
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vma = find_vma (current->mm, addr);
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if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) {
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up_read(¤t->mm->mmap_sem);
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return -EFAULT;
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}
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switch (op & CACHEFLUSH_D_PURGE) {
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case CACHEFLUSH_D_INVAL:
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__flush_invalidate_region((void *)addr, len);
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break;
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case CACHEFLUSH_D_WB:
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__flush_wback_region((void *)addr, len);
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break;
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case CACHEFLUSH_D_PURGE:
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__flush_purge_region((void *)addr, len);
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break;
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}
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if (op & CACHEFLUSH_I)
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flush_cache_all();
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up_read(¤t->mm->mmap_sem);
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return 0;
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}
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