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um: kill dead code around uaccess 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Al Viro 2011-08-18 20:03:29 +01:00 committed by Richard Weinberger
parent 6582b7f774
commit 5d40de0f6e
6 changed files with 3 additions and 77 deletions
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6
arch/um/include/shared/os.h
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@ -203,12 +203,6 @@ extern int os_drop_memory(void *addr, int length);
extern int can_drop_memory(void);
extern void os_flush_stdout(void);
/* uaccess.c */
extern unsigned long __do_user_copy(void *to, const void *from, int n,
void **fault_addr, jmp_buf **fault_catcher,
void (*op)(void *to, const void *from,
int n), int *faulted_out);
/* execvp.c */
extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
/* helper.c */

3
arch/um/include/shared/um_uaccess.h
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@ -32,9 +32,6 @@
extern int copy_from_user(void *to, const void __user *from, int n);
extern int copy_to_user(void __user *to, const void *from, int n);
extern int __do_copy_to_user(void *to, const void *from, int n,
void **fault_addr, jmp_buf **fault_catcher);
/*
* strncpy_from_user: - Copy a NUL terminated string from userspace.
* @dst: Destination address, in kernel space. This buffer must be at

2
arch/um/kernel/Makefile
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@ -11,7 +11,7 @@ clean-files :=
obj-y = config.o exec.o exitcode.o init_task.o irq.o ksyms.o mem.o \
physmem.o process.o ptrace.o reboot.o sigio.o \
signal.o smp.o syscall.o sysrq.o time.o tlb.o trap.o uaccess.o \
signal.o smp.o syscall.o sysrq.o time.o tlb.o trap.o \
um_arch.o umid.o skas/
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o

33
arch/um/kernel/uaccess.c
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@ -1,33 +0,0 @@
/*
* Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
/*
* These are here rather than tt/uaccess.c because skas mode needs them in
* order to do SIGBUS recovery when a tmpfs mount runs out of room.
*/
#include <linux/string.h>
#include "os.h"
static void __do_copy(void *to, const void *from, int n)
{
memcpy(to, from, n);
}
int __do_copy_to_user(void *to, const void *from, int n,
void **fault_addr, jmp_buf **fault_catcher)
{
unsigned long fault;
int faulted;
fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
__do_copy, &faulted);
if (!faulted)
return 0;
else
return n - (fault - (unsigned long) to);
}

4
arch/um/os-Linux/Makefile
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@ -4,14 +4,14 @@
#
obj-y = aio.o execvp.o file.o helper.o irq.o main.o mem.o process.o \
registers.o sigio.o signal.o start_up.o time.o tty.o uaccess.o \
registers.o sigio.o signal.o start_up.o time.o tty.o \
umid.o tls.o user_syms.o util.o drivers/ sys-$(SUBARCH)/ skas/
obj-$(CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA) += elf_aux.o
USER_OBJS := $(user-objs-y) aio.o elf_aux.o execvp.o file.o helper.o irq.o \
main.o mem.o process.o registers.o sigio.o signal.o start_up.o time.o \
tty.o tls.o uaccess.o umid.o util.o
tty.o tls.o umid.o util.o
CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)

32
arch/um/os-Linux/uaccess.c
View File

@ -1,32 +0,0 @@
/*
* Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include <stddef.h>
#include "longjmp.h"
unsigned long __do_user_copy(void *to, const void *from, int n,
void **fault_addr, jmp_buf **fault_catcher,
void (*op)(void *to, const void *from,
int n), int *faulted_out)
{
unsigned long *faddrp = (unsigned long *) fault_addr, ret;
jmp_buf jbuf;
*fault_catcher = &jbuf;
if (UML_SETJMP(&jbuf) == 0) {
(*op)(to, from, n);
ret = 0;
*faulted_out = 0;
}
else {
ret = *faddrp;
*faulted_out = 1;
}
*fault_addr = NULL;
*fault_catcher = NULL;
return ret;
}