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dt/flattree: explicitly pass command line pointer to early_init_dt_scan_chosen 

This patch drops the reference to a global 'cmd_line' variable from
early_init_dt_scan_chosen, and instead passes the pointer to the command
line string via the *data argument.  Each architecture does something
slightly different with the initial command line, so it makes sense for
the architecture to be able to specify the variable name.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Grant Likely 2011-04-29 00:18:16 -06:00
parent 693d92a1bb
commit 85f60ae4ee
5 changed files with 8 additions and 10 deletions
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2
arch/microblaze/kernel/prom.c
View File

@ -130,7 +130,7 @@ void __init early_init_devtree(void *params)
* device-tree, including the platform type, initrd location and
* size, TCE reserve, and more ...
*/
of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
of_scan_flat_dt(early_init_dt_scan_chosen, cmd_line);
/* Scan memory nodes and rebuild MEMBLOCKs */
memblock_init();

3
arch/mips/include/asm/prom.h
View File

@ -14,9 +14,6 @@
#ifdef CONFIG_OF
#include <asm/bootinfo.h>
/* which is compatible with the flattened device tree (FDT) */
#define cmd_line arcs_cmdline
extern int early_init_dt_scan_memory_arch(unsigned long node,
const char *uname, int depth, void *data);

3
arch/mips/kernel/prom.c
View File

@ -83,7 +83,8 @@ void __init early_init_devtree(void *params)
* device-tree, including the platform type, initrd location and
* size, and more ...
*/
of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
of_scan_flat_dt(early_init_dt_scan_chosen, arcs_cmdline);
/* Scan memory nodes */
of_scan_flat_dt(early_init_dt_scan_root, NULL);

2
arch/powerpc/kernel/prom.c
View File

@ -691,7 +691,7 @@ void __init early_init_devtree(void *params)
* device-tree, including the platform type, initrd location and
* size, TCE reserve, and more ...
*/
of_scan_flat_dt(early_init_dt_scan_chosen_ppc, NULL);
of_scan_flat_dt(early_init_dt_scan_chosen_ppc, cmd_line);
/* Scan memory nodes and rebuild MEMBLOCKs */
memblock_init();

8
drivers/of/fdt.c
View File

@ -670,7 +670,7 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
if (depth != 1 ||
if (depth != 1 || !data ||
(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
return 0;
@ -679,16 +679,16 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
/* Retrieve command line */
p = of_get_flat_dt_prop(node, "bootargs", &l);
if (p != NULL && l > 0)
strlcpy(cmd_line, p, min((int)l, COMMAND_LINE_SIZE));
strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE));
#ifdef CONFIG_CMDLINE
#ifndef CONFIG_CMDLINE_FORCE
if (p == NULL || l == 0 || (l == 1 && (*p) == 0))
#endif
strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
#endif /* CONFIG_CMDLINE */
pr_debug("Command line is: %s\n", cmd_line);
pr_debug("Command line is: %s\n", (char*)data);
/* break now */
return 1;