remove uneeded & broken set_fs()/get_fs() for kernel 5.10+ #345
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using set_fs() and get_fs() to access the memory is long uneeded and finally removed in linux kernel 5.10 +, this PR fixes build against 5.10+ by cease this behavior with a macro,
RTW_NO_SET_FS
. By default it is only enabled for 5.10+, but I recommend to define that any time as thisset_fs(KERNEL_DS)
usage may cause severe security holes in some way.