[PATCH] s390: early parameter parsing

Use common code parser for early parameters instead of our own.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 24f62f16c0e5e8640559ad3ae8b4fdba0a1d5db0..0a04e4a564b2a57ed7e30ac85e856215016ab019 100644 (file)
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -78,8 +78,6 @@ extern int _text,_etext, _edata, _end;
 
 #include <asm/setup.h>
 
-static char command_line[COMMAND_LINE_SIZE] = { 0, };
-
 static struct resource code_resource = {
        .name  = "Kernel code",
        .start = (unsigned long) &_text,
@@ -335,63 +333,38 @@ add_memory_hole(unsigned long start, unsigned long end)
        }
 }
 
-static void __init
-parse_cmdline_early(char **cmdline_p)
+static int __init early_parse_mem(char *p)
+{
+       memory_end = memparse(p, &p);
+       return 0;
+}
+early_param("mem", early_parse_mem);
+
+/*
+ * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
+ */
+static int __init early_parse_ipldelay(char *p)
 {
-       char c = ' ', cn, *to = command_line, *from = COMMAND_LINE;
        unsigned long delay = 0;
 
-       /* Save unparsed command line copy for /proc/cmdline */
-       memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
-       saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+       delay = simple_strtoul(p, &p, 0);
 
-       for (;;) {
-               /*
-                * "mem=XXX[kKmM]" sets memsize
-                */
-               if (c == ' ' && strncmp(from, "mem=", 4) == 0) {
-                       memory_end = simple_strtoul(from+4, &from, 0);
-                       if ( *from == 'K' || *from == 'k' ) {
-                               memory_end = memory_end << 10;
-                               from++;
-                       } else if ( *from == 'M' || *from == 'm' ) {
-                               memory_end = memory_end << 20;
-                               from++;
-                       }
-               }
-               /*
-                * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
-                */
-               if (c == ' ' && strncmp(from, "ipldelay=", 9) == 0) {
-                       delay = simple_strtoul(from+9, &from, 0);
-                       if (*from == 's' || *from == 'S') {
-                               delay = delay*1000000;
-                               from++;
-                       } else if (*from == 'm' || *from == 'M') {
-                               delay = delay*60*1000000;
-                               from++;
-                       }
-                       /* now wait for the requested amount of time */
-                       udelay(delay);
-               }
-               cn = *(from++);
-               if (!cn)
-                       break;
-               if (cn == '\n')
-                       cn = ' ';  /* replace newlines with space */
-               if (cn == 0x0d)
-                       cn = ' ';  /* replace 0x0d with space */
-               if (cn == ' ' && c == ' ')
-                       continue;  /* remove additional spaces */
-               c = cn;
-               if (to - command_line >= COMMAND_LINE_SIZE)
-                       break;
-               *(to++) = c;
+       switch (*p) {
+       case 's':
+       case 'S':
+               delay *= 1000000;
+               break;
+       case 'm':
+       case 'M':
+               delay *= 60 * 1000000;
        }
-       if (c == ' ' && to > command_line) to--;
-       *to = '\0';
-       *cmdline_p = command_line;
+
+       /* now wait for the requested amount of time */
+       udelay(delay);
+
+       return 0;
 }
+early_param("ipldelay", early_parse_ipldelay);
 
 static void __init
 setup_lowcore(void)
@@ -580,9 +553,26 @@ setup_arch(char **cmdline_p)
               "We are running native (64 bit mode)\n");
 #endif /* CONFIG_64BIT */
 
+       /* Save unparsed command line copy for /proc/cmdline */
+       strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
+
+       *cmdline_p = COMMAND_LINE;
+       *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0';
+
         ROOT_DEV = Root_RAM0;
+
+       init_mm.start_code = PAGE_OFFSET;
+       init_mm.end_code = (unsigned long) &_etext;
+       init_mm.end_data = (unsigned long) &_edata;
+       init_mm.brk = (unsigned long) &_end;
+
+       memory_end = memory_size;
+
+       parse_early_param();
+
 #ifndef CONFIG_64BIT
-       memory_end = memory_size & ~0x400000UL;  /* align memory end to 4MB */
+       memory_end &= ~0x400000UL;
+
         /*
          * We need some free virtual space to be able to do vmalloc.
          * On a machine with 2GB memory we make sure that we have at
@@ -591,17 +581,9 @@ setup_arch(char **cmdline_p)
         if (memory_end > 1920*1024*1024)
                 memory_end = 1920*1024*1024;
 #else /* CONFIG_64BIT */
-       memory_end = memory_size & ~0x200000UL;  /* detected in head.s */
+       memory_end &= ~0x200000UL;
 #endif /* CONFIG_64BIT */
 
-       init_mm.start_code = PAGE_OFFSET;
-       init_mm.end_code = (unsigned long) &_etext;
-       init_mm.end_data = (unsigned long) &_edata;
-       init_mm.brk = (unsigned long) &_end;
-
-       parse_cmdline_early(cmdline_p);
-       parse_early_param();
-
        setup_memory();
        setup_resources();
        setup_lowcore();