Patch "MIPS: asm: elf: Set O32 default FPU flags" has been added to the 4.0-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    MIPS: asm: elf: Set O32 default FPU flags

to the 4.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mips-asm-elf-set-o32-default-fpu-flags.patch
and it can be found in the queue-4.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ralf@linux-mips.org  Fri May  8 16:41:33 2015
From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 26 Feb 2015 11:11:30 +0000
Subject: MIPS: asm: elf: Set O32 default FPU flags
To: stable@vger.kernel.org
Message-ID: <f082010117c14678fa75a70db9862e89735ab6d6.1431087908.git.ralf@linux-mips.org>


From: Markos Chandras <markos.chandras@imgtec.com>

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 <markos.chandras@imgtec.com>
Reported-by: Mans Rullgard <mans@mansr.com>
Fixes: 46490b572544 ("MIPS: kernel: elf: Improve the overall ABI and FPU mode checks")
Tested-by: Mans Rullgard <mans@mansr.com>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Matthew Fortune <Matthew.Fortune@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/9344/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 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);				\
 									\


Patches currently in stable-queue which might be from ralf@linux-mips.org are

queue-4.0/mips-octeon-remove-udelay-causing-huge-irq-latency.patch
queue-4.0/mips-makefile-fix-mips-ase-detection-code.patch
queue-4.0/mips-r4kcache-use-correct-base-register-for-mips-r6-cache-flushes.patch
queue-4.0/mips-fix-cpu_has_mips_r2_exec_hazard.patch
queue-4.0/mips-ralink-fix-bad-config-symbol-in-pci-makefile.patch
queue-4.0/revert-mips-remove-race-window-in-page-fault-handling.patch
queue-4.0/mips-fix-race-condition-in-lazy-cache-flushing.patch
queue-4.0/mips-bcm63xx-move-bcm63xx_gpio_init-to-bcm63xx_register_devices.patch
queue-4.0/mips-octeon-delete-override-of-cpu_has_mips_r2_exec_hazard.patch
queue-4.0/mips-asm-spinlock-fix-addiu-instruction-for-r10000_llsc_war-case.patch
queue-4.0/mips-kconfig-disable-smp-cps-for-64-bit.patch
queue-4.0/mips-bcm47xx-fix-detecting-microsoft-mn-700-asus-wl500g.patch
queue-4.0/mips-octeon-use-correct-csr-to-soft-reset.patch
queue-4.0/revert-mips-avoid-pipeline-stalls-on-some-mips32r2-cores.patch
queue-4.0/mips-octeon-dma-octeon-fix-ohci-usb-config-check.patch
queue-4.0/mips-octeon-fix-pci-interrupt-mapping-for-d-link-dsr-1000n.patch
queue-4.0/mips-kconfig-fix-typo-for-the-r2-to-r6-emulator-kernel-parameter.patch
queue-4.0/ssb-fix-kconfig-dependencies.patch
queue-4.0/mips-kernel-entry.s-set-correct-isa-level-for-mips_ihb.patch
queue-4.0/mips-netlogic-fix-for-sata-phy-init.patch
queue-4.0/mips-ralink-add-missing-symbol-for-ralink_ill_acc.patch
queue-4.0/mips-asm-elf-set-o32-default-fpu-flags.patch
queue-4.0/mips-smp-cps-cpu_set-fpu-mask-if-fpu-present.patch