linux-kernel - Re: [RFC PATCH] add filesystem subtype support

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Message-Id: <E1HGjdh-0004h3-00@dorka.pomaz.szeredi.hu>
Date:	Mon, 12 Feb 2007 23:27:13 +0100
From:	Miklos Szeredi <miklos@...redi.hu>
To:	jengelh@...ux01.gwdg.de
CC:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	szaka@...net.hu
Subject: Re: [RFC PATCH] add filesystem subtype support

> >-static struct file_system_type **find_filesystem(const char *name)
> >+static struct file_system_type **find_filesystem(const char *name, unsigned len)
> > {
> > 	struct file_system_type **p;
> > 	for (p=&file_systems; *p; p=&(*p)->next)
> >-		if (strcmp((*p)->name,name) == 0)
> >+		if (strlen((*p)->name) == len &&
> >+		    strncmp((*p)->name, name, len) == 0)
> > 			break;
> > 	return p;
> > }
> 
> Question btw, why does this function return a struct file_system_type ** at
> all? Would not struct file_system_type * suffice?

It's used in register_filesystem() to get the end of the list pointer.

Miklos
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