The patch titled
rework reserved major handling
has been added to the -mm tree. Its filename is
rework-reserved-major-handling.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: rework reserved major handling
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
block/genhd.c | 9 ++-------
drivers/base/core.c | 14 ++++++++++++++
fs/char_dev.c | 8 ++------
include/linux/kdev_t.h | 1 +
4 files changed, 19 insertions(+), 13 deletions(-)
diff -puN block/genhd.c~rework-reserved-major-handling block/genhd.c
--- a/block/genhd.c~rework-reserved-major-handling
+++ a/block/genhd.c
@@ -5,6 +5,7 @@
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/genhd.h>
+#include <linux/kdev_t.h>
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/init.h>
@@ -61,13 +62,7 @@ int register_blkdev(unsigned int major,
/* temporary */
if (major == 0) {
for (index = ARRAY_SIZE(major_names)-1; index > 0; index--) {
- /*
- * Disallow the LANANA-assigned LOCAL/EXPERIMENTAL
- * majors
- */
- if ((60 <= index && index <= 63) ||
- (120 <= index && index <= 127) ||
- (240 <= index && index <= 254))
+ if (is_lanana_major(index))
continue;
if (major_names[index] == NULL)
break;
diff -puN fs/char_dev.c~rework-reserved-major-handling fs/char_dev.c
--- a/fs/char_dev.c~rework-reserved-major-handling
+++ a/fs/char_dev.c
@@ -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 ma
/* 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;
diff -puN drivers/base/core.c~rework-reserved-major-handling drivers/base/core.c
--- a/drivers/base/core.c~rework-reserved-major-handling
+++ a/drivers/base/core.c
@@ -28,6 +28,20 @@ int (*platform_notify)(struct device * d
int (*platform_notify_remove)(struct device * dev) = NULL;
/*
+ * Detect the LANANA-assigned LOCAL/EXPERIMENTAL majors
+ */
+bool is_lanana_major(unsigned int major)
+{
+ if (major >= 60 && major <= 63)
+ return 1;
+ if (major >= 120 && major <= 127)
+ return 1;
+ if (major >= 240 && major <= 254)
+ return 1;
+ return 0;
+}
+
+/*
* sysfs bindings for devices.
*/
diff -puN include/linux/kdev_t.h~rework-reserved-major-handling include/linux/kdev_t.h
--- a/include/linux/kdev_t.h~rework-reserved-major-handling
+++ a/include/linux/kdev_t.h
@@ -87,6 +87,7 @@ static inline unsigned sysv_minor(u32 de
return dev & 0x3ffff;
}
+bool is_lanana_major(unsigned int major);
#else /* __KERNEL__ */
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
xfs-warning-fix.patch
machzwd-warning-fix.patch
make-aout-executables-work-again-fix.patch
git-acpi.patch
sony-laptop-fix-uninitialised-variable.patch
git-arm.patch
git-powerpc.patch
git-drm.patch
git-dvb.patch
pvrusb-warning-fix.patch
git-input.patch
setstream-param-for-psmouse-tweak.patch
sis-warning-fixes.patch
dmaengine-uninline-large-functions.patch
git-mips-fixup.patch
git-mtd.patch
onenand_base-warning-fix.patch
sc520cdp-warning-fix.patch
netsc520-warning-fix.patch
ck804xrom-warning-fix.patch
esb2rom-warning-fixes.patch
amd76xrom-warning-fix.patch
ichxrom-warning-fix.patch
jffs2-warning-fixes.patch
cafe-warning-fix.patch
git-netdev-all.patch
Fabric7-VIOC-driver-fixes.patch
revert-drivers-net-tulip-dmfe-support-basic-carrier-detection.patch
dmfe-add-support-for-suspend-resume-fix.patch
sis900-warning-fixes.patch
git-parisc.patch
git-parisc-fixup.patch
git-pciseg.patch
git-s390.patch
git-scsi-misc.patch
revert-md-avoid-possible-bug_on-in-md-bitmap-handling-for-git-block.patch
git-block-fixup.patch
git-unionfs.patch
git-unionfs-fixup.patch
git-wireless-fixup.patch
after-before-x86_64-mm-mmconfig-share.patch
xen-paravirt-core-xen-implementation-fix.patch
mincore-warning-fix.patch
smaps-add-clear_refs-file-to-clear-reference-fix.patch
fix-rmmod-read-write-races-in-proc-entries-fix.patch
kprobes-list-all-active-probes-in-the-system.patch
reduce-size-of-task_struct-on-64-bit-machines-fix.patch
mm-shrink-parent-dentries-when-shrinking-slab.patch
add-epoll-compat-code-to-kernel-compatc-tidy.patch
genalloc-warning-fixes.patch
call-cpu_chain-with-cpu_down_failed-if-cpu_down_prepare-failed-vs-reduce-size-of-task_struct-on-64-bit-machines.patch
utrace-vs-reduce-size-of-task_struct-on-64-bit-machines.patch
local_t-mips-extension-shrink-duplicated-mips-32-64-bits-functions-from-localh-fix.patch
linux-kernel-markers-kconfig-menus-fix-4.patch
fb-sm501-framebuffer-driver-5-fix.patch
rework-reserved-major-handling.patch
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