On Thu, Jun 13, 2019 at 09:08:54AM +0200, Christoph Hellwig wrote:
Two branches of the ifdef maze actually have the same content, so merge
them.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
include/linux/flat.h | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/include/linux/flat.h b/include/linux/flat.h
index 2b7cda6e9c1b..19c586b74b99 100644
--- a/include/linux/flat.h
+++ b/include/linux/flat.h
@@ -69,15 +69,13 @@ struct flat_hdr {
typedef union {
unsigned long value;
struct {
-# if defined(mc68000) && !defined(CONFIG_COLDFIRE)
+#if defined(__LITTLE_ENDIAN_BITFIELD) || \
+ (defined(mc68000) && !defined(CONFIG_COLDFIRE))
signed long offset : 30;
unsigned long type : 2;
# elif defined(__BIG_ENDIAN_BITFIELD)
unsigned long type : 2;
signed long offset : 30;
-# elif defined(__LITTLE_ENDIAN_BITFIELD)
- signed long offset : 30;
- unsigned long type : 2;
# else
# error "Unknown bitfield order for flat files."
# endif
--
2.20.1
FWIW, I wonder if keeping that type is worth bothering.
Something like
old_reloc(__be32 reloc)
{
u32 v = be32_to_cpu(reloc);
int offset, type;
#if (defined(mc68000) && !defined(CONFIG_COLDFIRE))
/* old m68k uses unusual format - type is in lower bits of octet 3 */
type = v % 4;
offset = (int)v / 4;
#else
/* everything else (including coldfire) has it in upper bits of octet 0 */
type = v >> 30;
offset = (int)(v << 2) >> 2; /* or (v & 0x1fffffff) - (v & 0x20000000) * 4 */
#endif
...
and to hell with bitfields, aliasing unions, etc. Unless I'm misreading
the whole thing, that is... Greg?
