asm-generic: make the set_fs implementation optional
Put all the set_fs related code under CONFIG_SET_FS so that asm-generic/uaccess.h can be used for set_fs-less builds. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
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@ -94,6 +94,7 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n)
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#define INLINE_COPY_TO_USER
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#endif /* CONFIG_UACCESS_MEMCPY */
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#ifdef CONFIG_SET_FS
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#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
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#ifndef KERNEL_DS
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@ -116,6 +117,7 @@ static inline void set_fs(mm_segment_t fs)
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#ifndef uaccess_kernel
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#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
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#endif
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#endif /* CONFIG_SET_FS */
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#define access_ok(addr, size) __access_ok((unsigned long)(addr),(size))
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