linux-kernel - Re: [patch] pipe: Don't oops when pipe filesystem isn't mounted

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Date:	Mon, 11 Dec 2006 01:13:27 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Andrew MChuck Ebbert <76306.1226@...puserve.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Linus Torvalds orton <akpm@...l.org>" <torvalds@...l.org>
Subject: Re: [patch] pipe: Don't oops when pipe filesystem isn't mounted

On Mon, 11 Dec 2006 00:55:57 -0800
Andrew Morton <akpm@...l.org> wrote:

> I think the bug really is the running of populate_rootfs() before running
> the initcalls, in init/main.c:init().  It's just more sensible to start
> running userspace after the initcalls have been run.  Statically-linked
> drivers which want to load firmware files will lose.  To fix that we'd need
> a new callback.  It could be with a new linker section or perhaps simply a
> notifier chain.

hm, actually...  Add two new initcall levels, one for populate_rootfs() and
one for things which want to come after it (ie: drivers which want to
access the filesytem):

 #define core_initcall(fn)		__define_initcall("1",fn,1)
 #define core_initcall_sync(fn)		__define_initcall("1s",fn,1s)
 #define postcore_initcall(fn)		__define_initcall("2",fn,2)
 #define postcore_initcall_sync(fn)	__define_initcall("2s",fn,2s)
 #define arch_initcall(fn)		__define_initcall("3",fn,3)
 #define arch_initcall_sync(fn)		__define_initcall("3s",fn,3s)
 #define subsys_initcall(fn)		__define_initcall("4",fn,4)
 #define subsys_initcall_sync(fn)	__define_initcall("4s",fn,4s)
 #define fs_initcall(fn)		__define_initcall("5",fn,5)
 #define fs_initcall_sync(fn)		__define_initcall("5s",fn,5s)
 #define device_initcall(fn)		__define_initcall("6",fn,6)
 #define device_initcall_sync(fn)	__define_initcall("6s",fn,6s)
 #define late_initcall(fn)		__define_initcall("7",fn,7)
 #define late_initcall_sync(fn)		__define_initcall("7s",fn,7s)
+#define populate_rootfs_initcall ...
+#define post_populate_rootfs_initcall ...

?
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