[PATCH RESEND] Don't remove /sys in initramfs

From: Juerg Billeter (juerg_at_paldo.org)
Date: 11/11/04

  • Next message: Nguyen, Tom L: "RE: [PATCH] pci-mmconfig fix for 2.6.9" 
    To: linux-kernel@vger.kernel.org
Date:	Thu, 11 Nov 2004 17:33:48 +0100

    Using the "resume" kernel parameter together with an initramfs revealed
    a bug that causes removal of the /sys directory in the initramfs' tmpfs,
    making the system unbootable.

    The source of the problem is that the try_name() function removes
    the /sys directory unconditionally, instead of removing it only when it
    has been created by try_name().

    The attached patch only removes /sys if it has been created before.

    Please CC me, I'm not on lkml.

            Juerg 

    --
Signed-off-by: Juerg Billeter <juerg@paldo.org>
diff -upNr linux-2.6.10-rc1-bk15.orig/init/do_mounts.c linux-2.6.10-rc1-bk15/init/do_mounts.c
--- linux-2.6.10-rc1-bk15.orig/init/do_mounts.c 2004-10-18 23:53:51.000000000 +0200
+++ linux-2.6.10-rc1-bk15/init/do_mounts.c      2004-11-05 16:24:17.816549948 +0100
@@ -142,7 +142,7 @@ dev_t __init name_to_dev_t(char *name)
        int part;
 #ifdef CONFIG_SYSFS
-       sys_mkdir("/sys", 0700);
+       int mkdir_err = sys_mkdir("/sys", 0700);
        if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0)
                goto out;
 #endif
@@ -197,7 +197,8 @@ done:
 #ifdef CONFIG_SYSFS
        sys_umount("/sys", 0);
 out:
-       sys_rmdir("/sys");
+       if (!mkdir_err)
+               sys_rmdir("/sys");
 #endif
        return res;
 fail:
-
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