V4L/DVB (8379): saa7127: Make device detection optional

[linux-2.6-omap-h63xx.git] / init / initramfs.c

diff --git a/init/initramfs.c b/init/initramfs.c
index d28c1094d7e5ca8be38b50109161470ef2b27537..8eeeccb328c9f984812941592258ebd72e5d96e6 100644 (file)
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -57,7 +57,7 @@ static char __init *find_link(int major, int minor, int ino,
                        continue;
                return (*p)->name;
        }
-       q = (struct hash *)malloc(sizeof(struct hash));
+       q = kmalloc(sizeof(struct hash), GFP_KERNEL);
        if (!q)
                panic("can't allocate link hash entry");
        q->major = major;
@@ -77,7 +77,7 @@ static void __init free_hash(void)
                while (*p) {
                        q = *p;
                        *p = q->next;
-                       free(q);
+                       kfree(q);
                }
        }
 }
@@ -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;
@@ -182,6 +182,10 @@ static int __init do_collect(void)
 
 static int __init do_header(void)
 {
+       if (memcmp(collected, "070707", 6)==0) {
+               error("incorrect cpio method used: use -H newc option");
+               return 1;
+       }
        if (memcmp(collected, "070701", 6)) {
                error("no cpio magic");
                return 1;
@@ -441,10 +445,10 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
 {
        int written;
        dry_run = check_only;
-       header_buf = malloc(110);
-       symlink_buf = malloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1);
-       name_buf = malloc(N_ALIGN(PATH_MAX));
-       window = malloc(WSIZE);
+       header_buf = kmalloc(110, GFP_KERNEL);
+       symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL);
+       name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL);
+       window = kmalloc(WSIZE, GFP_KERNEL);
        if (!window || !header_buf || !symlink_buf || !name_buf)
                panic("can't allocate buffers");
        state = Start;
@@ -480,15 +484,25 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
                buf += inptr;
                len -= inptr;
        }
-       free(window);
-       free(name_buf);
-       free(symlink_buf);
-       free(header_buf);
+       kfree(window);
+       kfree(name_buf);
+       kfree(symlink_buf);
+       kfree(header_buf);
        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>
 
@@ -497,7 +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.
@@ -515,20 +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
-
-void __init populate_rootfs(void)
+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;
@@ -540,7 +555,7 @@ void __init populate_rootfs(void)
                        unpack_to_rootfs((char *)initrd_start,
                                initrd_end - initrd_start, 0);
                        free_initrd();
-                       return;
+                       return 0;
                }
                printk("it isn't (%s); looks like an initrd\n", err);
                fd = sys_open("/initrd.image", O_WRONLY|O_CREAT, 0700);
@@ -560,5 +575,6 @@ void __init populate_rootfs(void)
                free_initrd();
 #endif
        }
-#endif
+       return 0;
 }
+rootfs_initcall(populate_rootfs);