powerpc/boot: Allocate more memory for dtb

David Gibson suggested that since we are now unconditionally copying
the dtb into a malloc()ed buffer, it would be sensible to add a little
padding to the buffer at that point, so that further device tree
manipulations won't need to reallocate it.

This implements that suggestion.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/boot/libfdt-wrapper.c b/arch/powerpc/boot/libfdt-wrapper.c
index 9276327bc2bb1995343dabf417f2c3927386cd95..bb8b9b3505eecd5ce694371f0ababf41f4cf65b1 100644 (file)
--- a/arch/powerpc/boot/libfdt-wrapper.c
+++ b/arch/powerpc/boot/libfdt-wrapper.c
@@ -185,7 +185,7 @@ void fdt_init(void *blob)
 
        /* Make sure the dt blob is the right version and so forth */
        fdt = blob;
-       bufsize = fdt_totalsize(fdt) + 4;
+       bufsize = fdt_totalsize(fdt) + EXPAND_GRANULARITY;
        buf = malloc(bufsize);
        if(!buf)
                fatal("malloc failed. can't relocate the device tree\n\r");