From: feng247@yeah.net (feng247 at yeah.net)
To: kernelnewbies@lists.kernelnewbies.org
Subject: what's the mean of num in address_sapce
Date: Thu, 11 Jun 2015 14:46:01 +0800 [thread overview]
Message-ID: <201506111445555887596@yeah.net> (raw)
Hi,
in kernel 2.6.39, in /include/linux/compiler.h, I found the followed code:
# define __percpu __attribute__((noderef, address_space(3)))
#ifdef CONFIG_SPARSE_RCU_POINTER
# define __rcu __attribute__((noderef, address_space(4)))
#else
# define __rcu
address_space(num), if num is 0 ,it means kernel space,
1 , user space; 2, io space,
so 3 and 4 means what?
I found nothing about this by google.
Thanks,
feng
feng247 at yeah.net
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