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Commit db68ce10 authored by Al Viro's avatar Al Viro
Browse files

new helper: uaccess_kernel() 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent aaa2e7ac

arch/alpha/include/asm/uaccess.h

+1 −1
Original line number Diff line number Diff line
@@ -425,7 +425,7 @@ clear_user(void __user *to, long len) 
#undef __module_call



#define user_addr_max() \

        (segment_eq(get_fs(), USER_DS) ? TASK_SIZE : ~0UL)

        (uaccess_kernel() ? ~0UL : TASK_SIZE)



extern long strncpy_from_user(char *dest, const char __user *src, long count);

extern __must_check long strlen_user(const char __user *str);

arch/arc/include/asm/uaccess.h

+1 −1
Original line number Diff line number Diff line
@@ -27,7 +27,7 @@ 
#include <linux/string.h>	/* for generic string functions */





#define __kernel_ok		(segment_eq(get_fs(), KERNEL_DS))

#define __kernel_ok		(uaccess_kernel())



/*

 * Algorithmically, for __user_ok() we want do:

arch/arm/include/asm/uaccess.h

+1 −1
Original line number Diff line number Diff line
@@ -266,7 +266,7 @@ static inline void set_fs(mm_segment_t fs) 
#define access_ok(type, addr, size)	(__range_ok(addr, size) == 0)



#define user_addr_max() \

	(segment_eq(get_fs(), KERNEL_DS) ? ~0UL : get_fs())

	(uaccess_kernel() ? ~0UL : get_fs())



/*

 * The "__xxx" versions of the user access functions do not verify the

arch/arm/lib/uaccess_with_memcpy.c

+2 −2
Original line number Diff line number Diff line
@@ -90,7 +90,7 @@ __copy_to_user_memcpy(void __user *to, const void *from, unsigned long n) 
	unsigned long ua_flags;

	int atomic;



	if (unlikely(segment_eq(get_fs(), KERNEL_DS))) {

	if (uaccess_kernel()) {

		memcpy((void *)to, from, n);

		return 0;

	}
@@ -162,7 +162,7 @@ __clear_user_memset(void __user *addr, unsigned long n) 
{

	unsigned long ua_flags;



	if (unlikely(segment_eq(get_fs(), KERNEL_DS))) {

	if (uaccess_kernel()) {

		memset((void *)addr, 0, n);

		return 0;

	}

arch/blackfin/kernel/process.c

+1 −1
Original line number Diff line number Diff line
@@ -370,7 +370,7 @@ int _access_ok(unsigned long addr, unsigned long size) 
	/* Check that things do not wrap around */

	if (addr > ULONG_MAX - size)

		return 0;

	if (segment_eq(get_fs(), KERNEL_DS))

	if (uaccess_kernel())

		return 1;

#ifdef CONFIG_MTD_UCLINUX

	if (1)