linux-kernel - [PATCH] Re: [PATCH 1 of 2] Stackfs: Introduce stackfs_copy_{attr,inode}

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Message-ID: <Pine.LNX.4.61.0610151748310.7672@yvahk01.tjqt.qr>
Date:	Sun, 15 Oct 2006 19:38:12 +0200 (MEST)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Andrew James Wade <andrew.j.wade@...il.com>
cc:	Josef Jeff Sipek <jsipek@...sunysb.edu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	akpm@...l.org, torvalds@...l.org, hch@...radead.org,
	viro@....linux.org.uk, linux-fsdevel@...r.kernel.org,
	penberg@...helsinki.fi, ezk@...sunysb.edu, mhalcrow@...ibm.com
Subject: [PATCH] Re: [PATCH 1 of 2] Stackfs: Introduce stackfs_copy_{attr,inode}_*


>On Friday 13 October 2006 07:18, Josef Jeff Sipek wrote:
>> +static inline void stackfs_copy_inode_size(struct inode *dst,
>> +					   const struct inode *src)
>> +{
>> +	i_size_write(dst, i_size_read((struct inode *)src));
>
>Instead of casting, I'd change the signature of i_size_read.


Change the signature of i_size_read(), IMINOR() and IMAJOR() because 
they, or the functions they call, will never modify the argument.
Compile-tested on x86 allmodconfig.

Signed-off-by: Jan Engelhardt <jengelh@....de>


Index: linux-2.6.19-rc1/include/linux/fs.h
===================================================================
--- linux-2.6.19-rc1.orig/include/linux/fs.h
+++ linux-2.6.19-rc1/include/linux/fs.h
@@ -633,7 +633,7 @@ enum inode_i_mutex_lock_class
  * cmpxchg8b without the need of the lock prefix). For SMP compiles
  * and 64bit archs it makes no difference if preempt is enabled or not.
  */
-static inline loff_t i_size_read(struct inode *inode)
+static inline loff_t i_size_read(const struct inode *inode)
 {
 #if BITS_PER_LONG==32 && defined(CONFIG_SMP)
 	loff_t i_size;
@@ -672,12 +672,12 @@ static inline void i_size_write(struct i
 #endif
 }
 
-static inline unsigned iminor(struct inode *inode)
+static inline unsigned iminor(const struct inode *inode)
 {
 	return MINOR(inode->i_rdev);
 }
 
-static inline unsigned imajor(struct inode *inode)
+static inline unsigned imajor(const struct inode *inode)
 {
 	return MAJOR(inode->i_rdev);
 }
#<EOF>


	-`J'
-- 
-
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