From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicolas Iooss Subject: reiserfs: inconsistent format in __RASSERT Date: Mon, 16 Mar 2015 20:55:55 +0800 Message-ID: <5506D2DB.6040907@m4x.org> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Sender: reiserfs-devel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: reiserfs-devel@vger.kernel.org, Jeff Mahoney Cc: "linux-kernel@vger.kernel.org" Hello, When adding a __printf attribute to reiserfs_panic, gcc reported an inconsistent format for __RASSERT. This macro is currently defined in fs/reiserfs/reiserfs.h as: reiserfs_panic(NULL, "assertion failure", "(" #cond ") at " \ __FILE__ ":%i:%s: " format "\n", \ in_interrupt() ? -1 : task_pid_nr(current), \ __LINE__, __func__ , ##args); In the format string, the first parameter is a line number, but in the arguments there is a PID before. Before c3a9c2109f84 ("reiserfs: rework reiserfs_panic") [1], the format string began with "reiserfs[%i]" [2], which explains the PID in the arguments. I see three possibilities: * I missed something in my analysis and in fact the PID argument is processed by reiserfs_panic (don't know where), or * the PID argument is not used and should be removed, or * the PID is useful and "[%i]" should be added somewhere in the format string. Which one would you prefer? Also, I found this when building the kernel with "allmodconfig" on x86_64. With "defconfig" gcc does not report this error, but I guess it is because without CONFIG_REISERFS_CHECK, __RASSERT is never used. Regards, Nicolas [1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c3a9c2109f84882b9b3178f6b1838d550d3df0ec [2] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/linux/reiserfs_fs.h?id=78b6513d2881f1a759fb9825a036d926392de084#n91