[PATCH] kexec/fs2dt : Fix endianess issue with initrd base and size

[Laurent Dufour]

The initrd values exposed in the device tree of the kexeced kernel must be
encoded in Big Endian format.

Without this patch, kexeced LE kernel are expected to panic when dealing
with the initrd image.

Signed-off-by: Laurent Dufour <ldufour at linux.vnet.ibm.com>
---
 kexec/fs2dt.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/kexec/fs2dt.c b/kexec/fs2dt.c
index 5e6b98d..2a90979 100644
--- a/kexec/fs2dt.c
+++ b/kexec/fs2dt.c
@@ -531,7 +531,7 @@ static void putnode(void)
 	/* Add initrd entries to the second kernel */
 	if (initrd_base && initrd_size && !strcmp(basename,"chosen/")) {
 		int len = 8;
-		unsigned long long initrd_end;
+		uint64_t bevalue;
 
 		dt_reserve(&dt, 12); /* both props, of 6 words ea. */
 		*dt++ = cpu_to_be32(3);
@@ -539,7 +539,8 @@ static void putnode(void)
 		*dt++ = cpu_to_be32(propnum("linux,initrd-start"));
 		pad_structure_block(len);
 
-		memcpy(dt,&initrd_base,len);
+		bevalue = cpu_to_be64(initrd_base);
+		memcpy(dt, &bevalue, len);
 		dt += (len + 3)/4;
 
 		len = 8;
@@ -547,10 +548,10 @@ static void putnode(void)
 		*dt++ = cpu_to_be32(len);
 		*dt++ = cpu_to_be32(propnum("linux,initrd-end"));
 
-		initrd_end = initrd_base + initrd_size;
+		bevalue = cpu_to_be64(initrd_base + initrd_size);
 		pad_structure_block(len);
 
-		memcpy(dt,&initrd_end,len);
+		memcpy(dt, &bevalue, len);
 		dt += (len + 3)/4;
 
 		reserve(initrd_base, initrd_size);