x86: make mp_bus_id_to_type optional

[sfrench/cifs-2.6.git] / init / initramfs.c

diff --git a/init/initramfs.c b/init/initramfs.c
index 4fa0f7977de1a16db501d91c3c9b062cb7898c2d..d53fee8d8604a5514889bfcd93acee4dd882fae0 100644 (file)
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -133,7 +133,7 @@ static __initdata loff_t this_header, next_header;
 
 static __initdata int dry_run;
 
-static inline void eat(unsigned n)
+static inline void __init eat(unsigned n)
 {
        victim += n;
        this_header += n;
@@ -491,8 +491,18 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
        return message;
 }
 
+static int __initdata do_retain_initrd;
+
+static int __init retain_initrd_param(char *str)
+{
+       if (*str)
+               return 0;
+       do_retain_initrd = 1;
+       return 1;
+}
+__setup("retain_initrd", retain_initrd_param);
+
 extern char __initramfs_start[], __initramfs_end[];
-#ifdef CONFIG_BLK_DEV_INITRD
 #include <linux/initrd.h>
 #include <linux/kexec.h>
 
@@ -501,7 +511,11 @@ static void __init free_initrd(void)
 #ifdef CONFIG_KEXEC
        unsigned long crashk_start = (unsigned long)__va(crashk_res.start);
        unsigned long crashk_end   = (unsigned long)__va(crashk_res.end);
+#endif
+       if (do_retain_initrd)
+               goto skip;
 
+#ifdef CONFIG_KEXEC
        /*
         * If the initrd region is overlapped with crashkernel reserved region,
         * free only memory that is not part of crashkernel region.
@@ -519,20 +533,17 @@ static void __init free_initrd(void)
        } else
 #endif
                free_initrd_mem(initrd_start, initrd_end);
-
+skip:
        initrd_start = 0;
        initrd_end = 0;
 }
 
-#endif
-
 static int __init populate_rootfs(void)
 {
        char *err = unpack_to_rootfs(__initramfs_start,
                         __initramfs_end - __initramfs_start, 0);
        if (err)
                panic(err);
-#ifdef CONFIG_BLK_DEV_INITRD
        if (initrd_start) {
 #ifdef CONFIG_BLK_DEV_RAM
                int fd;
@@ -564,7 +575,6 @@ static int __init populate_rootfs(void)
                free_initrd();
 #endif
        }
-#endif
        return 0;
 }
 rootfs_initcall(populate_rootfs);