[ARM] 2941/1: Fix running legacy binaries from a soft-float root filesystem with CONFIG_IWMMXT.

Patch from Daniel Jacobowitz

Thread flags are inherited on fork().  In order for a binary which has
the iWMMXt coprocessor enabled to run a binary which needs the FPA
emulation, we need to explicitly clear TIF_USING_IWMMXT if we are not
going to set it.

Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/asm-arm/elf.h b/include/asm-arm/elf.h
index a1696ba238d3..7da97a937548 100644
--- a/include/asm-arm/elf.h
+++ b/include/asm-arm/elf.h
@@ -124,6 +124,8 @@ do { \
         if (((ex).e_flags & EF_ARM_EABI_MASK) || \
             ((ex).e_flags & EF_ARM_SOFT_FLOAT)) \
                 set_thread_flag(TIF_USING_IWMMXT); \
+        else \
+                clear_thread_flag(TIF_USING_IWMMXT); \
 } while (0)
 
 #endif