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[PATCH] rework reserved major handling

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Several people have reported failures in dynamic major device number handling
due to the recent changes in there to avoid handing out the local/experimental
majors.

Rolf reports that this is due to a gcc-4.1.0 bug.

The patch refactors that code a lot in an attempt to provoke the compiler into
behaving.

Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton
2007-02-20 13:57:48 -08:00
committed by Linus Torvalds
parent f4fa27c16b
commit b446b60e4e
4 changed files with 19 additions and 13 deletions
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8
fs/char_dev.c
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@@ -6,6 +6,7 @@
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/kdev_t.h>
#include <linux/slab.h>
#include <linux/string.h>
@@ -108,12 +109,7 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
/* temporary */
if (major == 0) {
for (i = ARRAY_SIZE(chrdevs)-1; i > 0; i--) {
/*
* Disallow the LANANA-assigned LOCAL/EXPERIMENTAL
* majors
*/
if ((60 <= i && i <= 63) || (120 <= i && i <= 127) ||
(240 <= i && i <= 254))
if (is_lanana_major(i))
continue;
if (chrdevs[i] == NULL)
break;