>This patch allows users to read region 5 from /dev/kmem and >enhances range check of it.
I'm uneasy about this change to drivers/char/mem.c. Won't it stop
those architectures that have memory at physical 0x0 from accessing
it?
ptr = xlate_dev_mem_ptr(p);
-
+ if (!ptr)
+ return -EFAULT
-Tony
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