Set good default FPU flags (FR0) for O32 binaries similar to what the
kernel does for the N64/N32 ones. This also fixes a regression
introduced in commit 46490b572544 ("MIPS: kernel: elf: Improve the
overall ABI and FPU mode checks") when MIPS_O32_FP64_SUPPORT is
disabled. In that case, the mips_set_personality_fp() did not set the
FPU mode at all because it assumed that the FPU mode was already set
properly. That led to O32 userland problems.

Cc: Matthew Fortune <redacted>
Cc: Paul Burton <redacted>
Reported-by: Mans Rullgard <redacted>
Fixes: 46490b572544 ("MIPS: kernel: elf: Improve the overall ABI and FPU mode checks")
Signed-off-by: Markos Chandras <redacted>
---
 arch/mips/include/asm/elf.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/mips/include/asm/elf.h b/arch/mips/include/asm/elf.h
index 535f196ffe02..694925a26924 100644
--- a/arch/mips/include/asm/elf.h
+++ b/arch/mips/include/asm/elf.h

@@ -294,6 +294,9 @@ do {									\
 	if (personality(current->personality) != PER_LINUX)		\
 		set_personality(PER_LINUX);				\
 									\
+	clear_thread_flag(TIF_HYBRID_FPREGS);				\
+	set_thread_flag(TIF_32BIT_FPREGS);				\
+									\
 	mips_set_personality_fp(state);					\
 									\
 	current->thread.abi = &mips_abi;				\

@@ -319,6 +322,8 @@ do {									\
 	do {								\
 		set_thread_flag(TIF_32BIT_REGS);			\
 		set_thread_flag(TIF_32BIT_ADDR);			\
+		clear_thread_flag(TIF_HYBRID_FPREGS);			\
+		set_thread_flag(TIF_32BIT_FPREGS);			\
 									\
 		mips_set_personality_fp(state);				\
 									\

-- 
2.3.0