mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-21 10:01:00 +00:00
42daba3165
Throw out a lot of code dealing with saving and restoring floating-point
state. In skas mode, where processes run in a restoring floating-point state
on kernel entry and exit is pointless.
This eliminates most of arch/um/os-Linux/sys-{i386,x86_64}/registers.c. Most
of what remained is now arch-indpendent, and can be moved up to
arch/um/os-Linux/registers.c. Both arches need the jmp_buf accessor
get_thread_reg, and i386 needs {save,restore}_fp_regs because it cheats during
sigreturn by getting the fp state using ptrace rather than copying it out of
the process sigcontext.
After this, it turns out that arch/um/include/skas/mode-skas.h is almost
completely unneeded. The declarations in it are variables which either don't
exist or which don't have global scope. The one exception is
kill_off_processes_skas. If that's removed, this header can be deleted.
This uncovered a bug in user.h, which wasn't correctly making sure that a
size_t definition was available to both userspace and kernelspace files.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
34 lines
906 B
C
34 lines
906 B
C
/*
|
|
* Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __USER_H__
|
|
#define __USER_H__
|
|
|
|
/*
|
|
* The usual definition - copied here because the kernel provides its own,
|
|
* fancier, type-safe, definition. Using that one would require
|
|
* copying too much infrastructure for my taste, so userspace files
|
|
* get less checking than kernel files.
|
|
*/
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
|
|
|
/* This is to get size_t */
|
|
#ifdef __KERNEL__
|
|
#include <linux/types.h>
|
|
#else
|
|
#include <stddef.h>
|
|
#endif
|
|
|
|
extern void panic(const char *fmt, ...)
|
|
__attribute__ ((format (printf, 1, 2)));
|
|
extern int printk(const char *fmt, ...)
|
|
__attribute__ ((format (printf, 1, 2)));
|
|
extern void schedule(void);
|
|
extern int in_aton(char *str);
|
|
extern int open_gdb_chan(void);
|
|
extern size_t strlcpy(char *, const char *, size_t);
|
|
extern size_t strlcat(char *, const char *, size_t);
|
|
|
|
#endif
|