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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 */
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#ifndef _H8300_SEGMENT_H
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#define _H8300_SEGMENT_H
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/* define constants */
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#define USER_DATA (1)
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#ifndef __USER_DS
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#define __USER_DS (USER_DATA)
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#endif
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#define USER_PROGRAM (2)
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#define SUPER_DATA (3)
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#ifndef __KERNEL_DS
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#define __KERNEL_DS (SUPER_DATA)
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#endif
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#define SUPER_PROGRAM (4)
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#ifndef __ASSEMBLY__
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
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#define USER_DS MAKE_MM_SEG(__USER_DS)
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#define KERNEL_DS MAKE_MM_SEG(__KERNEL_DS)
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/*
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* Get/set the SFC/DFC registers for MOVES instructions
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*/
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static inline mm_segment_t get_fs(void)
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{
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return USER_DS;
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}
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#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
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#endif /* __ASSEMBLY__ */
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#endif /* _H8300_SEGMENT_H */
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