4.0-stable review patch. If anyone has any objections, please let me know.
------------------ From: Markos Chandras <[email protected]> Commit 48f8eaee3f59848809644507fc47363b37e54450 upstream. 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. Signed-off-by: Markos Chandras <[email protected]> Reported-by: Mans Rullgard <[email protected]> Fixes: 46490b572544 ("MIPS: kernel: elf: Improve the overall ABI and FPU mode checks") Tested-by: Mans Rullgard <[email protected]> Tested-by: Aaro Koskinen <[email protected]> Cc: Matthew Fortune <[email protected]> Cc: Paul Burton <[email protected]> Cc: [email protected] Patchwork: http://patchwork.linux-mips.org/patch/9344/ Signed-off-by: Ralf Baechle <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/mips/include/asm/elf.h | 5 +++++ 1 file changed, 5 insertions(+) --- 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); \ \ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
