[MIPS] Probe initrd header only if explicitly specified

[linux-2.6-omap-h63xx.git] / arch / mips / kernel / setup.c

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 2aae76bce29355183f9697cb314dec3306d89af5..16f8edfe5cdce81a63d850980cb0dda08e94049f 100644 (file)
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -160,30 +160,33 @@ early_param("rd_size", rd_size_early);
 static unsigned long __init init_initrd(void)
 {
        unsigned long end;
-       u32 *initrd_header;
 
        /*
         * Board specific code or command line parser should have
         * already set up initrd_start and initrd_end. In these cases
         * perfom sanity checks and use them if all looks good.
         */
-       if (initrd_start && initrd_end > initrd_start)
-               goto sanitize;
+       if (!initrd_start || initrd_end <= initrd_start) {
+#ifdef CONFIG_PROBE_INITRD_HEADER
+               u32 *initrd_header;
 
-       /*
-        * See if initrd has been added to the kernel image by
-        * arch/mips/boot/addinitrd.c. In that case a header is
-        * prepended to initrd and is made up by 8 bytes. The fisrt
-        * word is a magic number and the second one is the size of
-        * initrd.  Initrd start must be page aligned in any cases.
-        */
-       initrd_header = __va(PAGE_ALIGN(__pa_symbol(&_end) + 8)) - 8;
-       if (initrd_header[0] != 0x494E5244)
+               /*
+                * See if initrd has been added to the kernel image by
+                * arch/mips/boot/addinitrd.c. In that case a header is
+                * prepended to initrd and is made up by 8 bytes. The first
+                * word is a magic number and the second one is the size of
+                * initrd.  Initrd start must be page aligned in any cases.
+                */
+               initrd_header = __va(PAGE_ALIGN(__pa_symbol(&_end) + 8)) - 8;
+               if (initrd_header[0] != 0x494E5244)
+                       goto disable;
+               initrd_start = (unsigned long)(initrd_header + 2);
+               initrd_end = initrd_start + initrd_header[1];
+#else
                goto disable;
-       initrd_start = (unsigned long)(initrd_header + 2);
-       initrd_end = initrd_start + initrd_header[1];
+#endif
+       }
 
-sanitize:
        if (initrd_start & ~PAGE_MASK) {
                pr_err("initrd start must be page aligned\n");
                goto disable;