From: venkatram867@gmail.com (Ram Tummala)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Doubt regarding PageLocked in Linux kernel source
Date: Thu, 19 Apr 2012 00:37:03 -0700 [thread overview]
Message-ID: <-3263537849620940222@unknownmsgid> (raw)
In-Reply-To: <E351E450E8B9F54684A699D42DC5ADF21F695168@MPBAGVEX02.corp.mphasis.com>
On Apr 19, 2012, at 12:15 AM, Shashidhara Shamaiah <
Shashidhara.Shamaiah@mphasis.com> wrote:
Hi,
I was looking at the source file fs/jbd/transaction.c . In the function
journal_invalidatepage the code calls the macro
PageLocked . I need to look at its implementation. I could locate where the
definition of PageLocked. Its not a function as its absent in the
System.map file. I have searched in internet. It was defined as a macro in
older kernels. But I could not get its definition in the recent kernels.
Please point me to the right direction.
Yes, it's not a function, it's a macro. Page flags are cleverly implemented
in the Linux kernel as macros. You wont be able to cscope into it. See
http://lxr.linux.no/linux+v3.3.2/include/linux/page-flags.h for
implementation details.
Venkatram Tummala
Regards
Shashidhara
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Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-19 6:58 Doubt regarding PageLocked in Linux kernel source Shashidhara Shamaiah
2012-04-19 7:37 ` Ram Tummala [this message]
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