[rtems commit] sparc: Relax CPU_STACK_ALIGNMENT

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    3d20f5fbb7602ec7e27859f6c3ee97708e826bc8
Changeset: http://git.rtems.org/rtems/commit/?id=3d20f5fbb7602ec7e27859f6c3ee97708e826bc8

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Mon Jan 23 15:04:44 2017 +0100

sparc: Relax CPU_STACK_ALIGNMENT

Close #2352.

---

 cpukit/score/cpu/sparc/rtems/score/cpu.h | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/cpukit/score/cpu/sparc/rtems/score/cpu.h b/cpukit/score/cpu/sparc/rtems/score/cpu.h
index 6d8e1f9..a59fc36 100644
--- a/cpukit/score/cpu/sparc/rtems/score/cpu.h
+++ b/cpukit/score/cpu/sparc/rtems/score/cpu.h
@@ -826,19 +826,10 @@ extern const CPU_Trap_table_entry _CPU_Trap_slot_template;
 #define CPU_PARTITION_ALIGNMENT    CPU_ALIGNMENT
 
 /**
- * This number corresponds to the byte alignment requirement for the
- * stack.  This alignment requirement may be stricter than that for the
- * data types alignment specified by CPU_ALIGNMENT.  If the CPU_ALIGNMENT
- * is strict enough for the stack, then this should be set to 0.
- *
- * NOTE:  This must be a power of 2 either 0 or greater than CPU_ALIGNMENT.
- *
- * The alignment restrictions for the SPARC are not that strict but this
- * should unsure that the stack is always sufficiently alignment that the
- * window overflow, underflow, and flush routines can use double word loads
- * and stores.
+ * Stack frames must be doubleword aligned according to the System V ABI for
+ * SPARC.
  */
-#define CPU_STACK_ALIGNMENT        16
+#define CPU_STACK_ALIGNMENT CPU_ALIGNMENT
 
 #ifndef ASM