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s390/uaccess: Make s390_kernel_write() usable for decompressor
To avoid lots of ifdefs in C code make s390_kernel_write() usable for the decompressor: simply use memcpy() for this case since there is no write protection enabled that early. Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Tested-by: Sven Schnelle <svens@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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@ -332,7 +332,14 @@ static inline unsigned long __must_check clear_user(void __user *to, unsigned lo
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return __clear_user(to, n);
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}
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void *s390_kernel_write(void *dst, const void *src, size_t size);
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void *__s390_kernel_write(void *dst, const void *src, size_t size);
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static inline void *s390_kernel_write(void *dst, const void *src, size_t size)
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{
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if (__is_defined(__DECOMPRESSOR))
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return memcpy(dst, src, size);
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return __s390_kernel_write(dst, src, size);
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}
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int __noreturn __put_kernel_bad(void);
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@ -48,7 +48,7 @@ static notrace long s390_kernel_write_odd(void *dst, const void *src, size_t siz
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}
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/*
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* s390_kernel_write - write to kernel memory bypassing DAT
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* __s390_kernel_write - write to kernel memory bypassing DAT
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* @dst: destination address
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* @src: source address
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* @size: number of bytes to copy
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@ -61,7 +61,7 @@ static notrace long s390_kernel_write_odd(void *dst, const void *src, size_t siz
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*/
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static DEFINE_SPINLOCK(s390_kernel_write_lock);
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notrace void *s390_kernel_write(void *dst, const void *src, size_t size)
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notrace void *__s390_kernel_write(void *dst, const void *src, size_t size)
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{
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void *tmp = dst;
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unsigned long flags;
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