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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>
34 lines
860 B
C
34 lines
860 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_SH_SEGMENT_H
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#define __ASM_SH_SEGMENT_H
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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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/*
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* The fs value determines whether argument validity checking should be
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* performed or not. If get_fs() == USER_DS, checking is performed, with
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* get_fs() == KERNEL_DS, checking is bypassed.
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*
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* For historical reasons, these macros are grossly misnamed.
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*/
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#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
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#ifdef CONFIG_MMU
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#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
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#else
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#define USER_DS KERNEL_DS
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#endif
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#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
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#define get_fs() (current_thread_info()->addr_limit)
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#define set_fs(x) (current_thread_info()->addr_limit = (x))
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_SH_SEGMENT_H */
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