powerpc: Make dummy section a valid note header

We are declaring the dummy section (used to work around a binutils
bug) as PT_NOTE, but we don't have enough bytes for it to be a valid
note header, and kexec userspace complains:

Warning: Elf Note name is not null terminated
Warning: append= option is not passed. Using the first kernel root partition
Warning: Elf Note name is not null terminated

Instead of using the arbitray value 0xf177 (aka "fill"), declare a
no-name no-description note of type 0.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 47bf15c..161b9b9 100644 (file)
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -87,7 +87,9 @@ SECTIONS
        /* The dummy segment contents for the bug workaround mentioned above
           near PHDRS.  */
        .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
-               LONG(0xf177)
+               LONG(0)
+               LONG(0)
+               LONG(0)
        } :kernel :dummy
 
 /*