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Commit 2363cc02 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds
Browse files

[PATCH] remove protection of LANANA-reserved majors 



Revert all this.  It can cause device-mapper to receive a different major from
earlier kernels and it turns out that the Amanda backup program (via GNU tar,
apparently) checks major numbers on files when performing incremental backups.

Which is a bit broken of Amanda (or tar), but this feature isn't important
enough to justify the churn.

Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent c75fd0ee

block/genhd.c

+0 −2
Original line number Diff line number Diff line
@@ -62,8 +62,6 @@ int register_blkdev(unsigned int major, const char *name) 
	/* temporary */

	if (major == 0) {

		for (index = ARRAY_SIZE(major_names)-1; index > 0; index--) {

			if (is_lanana_major(index))

				continue;

			if (major_names[index] == NULL)

				break;

		}

drivers/base/core.c

+0 −14
Original line number Diff line number Diff line
@@ -27,20 +27,6 @@ 
int (*platform_notify)(struct device * dev) = NULL;

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.

 */

fs/char_dev.c

+0 −2
Original line number Diff line number Diff line
@@ -109,8 +109,6 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor, 
	/* temporary */

	if (major == 0) {

		for (i = ARRAY_SIZE(chrdevs)-1; i > 0; i--) {

			if (is_lanana_major(i))

				continue;

			if (chrdevs[i] == NULL)

				break;

		}

include/linux/kdev_t.h

+0 −2
Original line number Diff line number Diff line
@@ -87,8 +87,6 @@ static inline unsigned sysv_minor(u32 dev) 
	return dev & 0x3ffff;

}



bool is_lanana_major(unsigned int major);



#else /* __KERNEL__ */



/*