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Commit 079f85e6 authored by Michal Marek's avatar Michal Marek Committed by H. Peter Anvin
Browse files

x86, build: Do not set the root_dev field in bzImage 



This has been obsoleted by the root= commandline and the rdev utility
for many, many years.  People who still depend on this will surely
have a copy of the rdev utility around, the rest of the world gets rid
of another piece of buildhost-dependent data in the build. Thanks to
Paul Bolle for the build.c cleanup.

Cc: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
Link: http://lkml.kernel.org/r/1302607824-24699-1-git-send-email-mmarek@suse.cz


Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent 61c4f2c8

arch/x86/boot/Makefile

+1 −8
Original line number Diff line number Diff line
@@ -9,12 +9,6 @@ 
# Changed by many, many contributors over the years.

#



# ROOT_DEV specifies the default root-device when making the image.

# This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case

# the default of FLOPPY is used by 'build'.



ROOT_DEV	:= CURRENT



# If you want to preset the SVGA mode, uncomment the next line and

# set SVGA_MODE to whatever number you want.

# Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode.
@@ -75,8 +69,7 @@ GCOV_PROFILE := n 
$(obj)/bzImage: asflags-y  := $(SVGA_MODE)



quiet_cmd_image = BUILD   $@

cmd_image = $(obj)/tools/build $(obj)/setup.bin $(obj)/vmlinux.bin \

	$(ROOT_DEV) > $@

cmd_image = $(obj)/tools/build $(obj)/setup.bin $(obj)/vmlinux.bin > $@



$(obj)/bzImage: $(obj)/setup.bin $(obj)/vmlinux.bin $(obj)/tools/build FORCE

	$(call if_changed,image)

arch/x86/boot/tools/build.c

+4 −29
Original line number Diff line number Diff line
@@ -130,7 +130,7 @@ static void die(const char * str, ...) 


static void usage(void)

{

	die("Usage: build setup system [rootdev] [> image]");

	die("Usage: build setup system [> image]");

}



int main(int argc, char ** argv)
@@ -138,39 +138,14 @@ int main(int argc, char ** argv) 
	unsigned int i, sz, setup_sectors;

	int c;

	u32 sys_size;

	u8 major_root, minor_root;

	struct stat sb;

	FILE *file;

	int fd;

	void *kernel;

	u32 crc = 0xffffffffUL;



	if ((argc < 3) || (argc > 4))

	if (argc != 3)

		usage();

	if (argc > 3) {

		if (!strcmp(argv[3], "CURRENT")) {

			if (stat("/", &sb)) {

				perror("/");

				die("Couldn't stat /");

			}

			major_root = major(sb.st_dev);

			minor_root = minor(sb.st_dev);

		} else if (strcmp(argv[3], "FLOPPY")) {

			if (stat(argv[3], &sb)) {

				perror(argv[3]);

				die("Couldn't stat root device.");

			}

			major_root = major(sb.st_rdev);

			minor_root = minor(sb.st_rdev);

		} else {

			major_root = 0;

			minor_root = 0;

		}

	} else {

		major_root = DEFAULT_MAJOR_ROOT;

		minor_root = DEFAULT_MINOR_ROOT;

	}

	fprintf(stderr, "Root device is (%d, %d)\n", major_root, minor_root);



	/* Copy the setup code */

	file = fopen(argv[1], "r");
@@ -193,8 +168,8 @@ int main(int argc, char ** argv) 
	memset(buf+c, 0, i-c);



	/* Set the default root device */

	buf[508] = minor_root;

	buf[509] = major_root;

	buf[508] = DEFAULT_MINOR_ROOT;

	buf[509] = DEFAULT_MAJOR_ROOT;



	fprintf(stderr, "Setup is %d bytes (padded to %d bytes).\n", c, i);