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>

diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index 00ee90f..b15cc21 100644 (file)
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -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();

diff --git a/arch/mips/include/asm/prom.h b/arch/mips/include/asm/prom.h
index f29b862..857d9b7 100644 (file)
--- a/arch/mips/include/asm/prom.h
+++ b/arch/mips/include/asm/prom.h
@@ -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);
 

diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index a19811e..5b7eade 100644 (file)
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -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);

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index e74fa12..c173bee 100644 (file)
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -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();

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 8b63a69..65200af 100644 (file)
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -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;