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Date:   Wed, 4 Sep 2019 09:02:09 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     zhao.hang1@....com.cn
Cc:     adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, xue.zhihong@....com.cn,
        wang.yi59@....com.cn, jiang.xuexin@....com.cn
Subject: Re: [PATCH] fs:ext4:remove unused including <linux/version.h>

On Wed, Sep 04, 2019 at 03:36:28PM +0800, zhao.hang1@....com.cn wrote:
> fix compiler error in ext4.hfs/ext4/ext4.h:30:27: fatal error: linux/version.h: No such file or directorySigned-off-by: Zhao Hang <zhao.hang1@....com.cn> --- fs/ext4/ext4.h | 1 - 1 file changed, 1 deletion(-)diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.hindex 1cb6785..9baa4cf 100644--- a/fs/ext4/ext4.h+++ b/fs/ext4/ext4.h@@ -27,7 +27,6 @@ #include <linux/seqlock.h>  #include <linux/mutex.h>  #include <linux/timer.h> -#include <linux/version.h>  #include <linux/wait.h>  #include <linux/sched/signal.h>  #include <linux/blockgroup_lock.h> --  2.15.2

First of all, this patch is completely white space namaged.

Secondly, this is a problem in how you are building your kernel (or
ext4 as a module, if you are trying to build ext4 as some kind of out
of tree module or some such).  When you do a kernel build, the file
include/linux/version.h is automatically generated.  It will look
something like this.

% cat /build/ext4-64/usr/include/linux/version.h
#define LINUX_VERSION_CODE 327936
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))

			      	       	     - Ted

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