428e2976a5
segment_eq is only used to implement uaccess_kernel. Just open code uaccess_kernel in the arch uaccess headers and remove one layer of indirection. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Greentime Hu <green.hu@gmail.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Nick Hu <nickhu@andestech.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Link: http://lkml.kernel.org/r/20200710135706.537715-5-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
40 lines
788 B
C
40 lines
788 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _H8300_SEGMENT_H
|
|
#define _H8300_SEGMENT_H
|
|
|
|
/* define constants */
|
|
#define USER_DATA (1)
|
|
#ifndef __USER_DS
|
|
#define __USER_DS (USER_DATA)
|
|
#endif
|
|
#define USER_PROGRAM (2)
|
|
#define SUPER_DATA (3)
|
|
#ifndef __KERNEL_DS
|
|
#define __KERNEL_DS (SUPER_DATA)
|
|
#endif
|
|
#define SUPER_PROGRAM (4)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
typedef struct {
|
|
unsigned long seg;
|
|
} mm_segment_t;
|
|
|
|
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
|
|
#define USER_DS MAKE_MM_SEG(__USER_DS)
|
|
#define KERNEL_DS MAKE_MM_SEG(__KERNEL_DS)
|
|
|
|
/*
|
|
* Get/set the SFC/DFC registers for MOVES instructions
|
|
*/
|
|
|
|
static inline mm_segment_t get_fs(void)
|
|
{
|
|
return USER_DS;
|
|
}
|
|
|
|
#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _H8300_SEGMENT_H */
|