linux/arch/x86
Ingo Molnar c5bedc6847 x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active
Introduce a simple fpu->fpstate_active flag in the fpu context data structure
and use that instead of PF_USED_MATH in task->flags.

Testing for this flag byte should be slightly more efficient than
testing a bit in a bitmask, but the main advantage is that most
FPU functions can now be performed on a 'struct fpu' alone, they
don't need access to 'struct task_struct' anymore.

There's a slight linecount increase, mostly due to the 'fpu' local
variables and due to extra comments. The local variables will go away
once we move most of the FPU methods to pure 'struct fpu' parameters.

Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-05-19 15:47:25 +02:00
..
boot * Avoid garbage names in efivarfs due to buggy firmware by zero'ing 2015-05-06 08:30:24 +02:00
configs x86/build/defconfig: Enable USB_EHCI_TT_NEWSCHED=y 2015-02-19 02:21:14 +01:00
crypto x86/fpu: Fix header file dependencies of fpu-internal.h 2015-05-19 15:47:16 +02:00
ia32 x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active 2015-05-19 15:47:25 +02:00
include x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active 2015-05-19 15:47:25 +02:00
kernel x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active 2015-05-19 15:47:25 +02:00
kvm x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active 2015-05-19 15:47:25 +02:00
lguest Some virtio internal cleanups, a new virtio device "virtio input", and 2015-04-22 10:55:06 -07:00
lib x86: fix special __probe_kernel_write() tail zeroing case 2015-04-24 06:58:27 -07:00
math-emu x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active 2015-05-19 15:47:25 +02:00
mm x86/fpu: Remove fpu_xsave() 2015-05-19 15:47:19 +02:00
net x86: bpf_jit: fix FROM_BE16 and FROM_LE16/32 instructions 2015-05-12 23:13:08 -04:00
oprofile x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()' 2015-03-23 11:14:17 +01:00
pci x86/PCI/ACPI: Make all resources except [io 0xcf8-0xcff] available on PCI bus 2015-04-30 22:17:34 +02:00
platform TTY/Serial patches for 4.1-rc1 2015-04-21 09:33:10 -07:00
power x86/asm/entry: Rename 'init_tss' to 'cpu_tss' 2015-03-06 08:32:58 +01:00
purgatory
realmode Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-02-16 14:58:12 -08:00
syscalls xen: features and fixes for 4.1-rc0 2015-04-16 14:01:03 -05:00
tools
um Merge branch 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc 2015-04-15 13:53:55 -07:00
vdso x86/vdso: Fix 'make bzImage' on older distros 2015-05-11 10:25:02 +02:00
video
xen x86/fpu: Rename fpu_init() to fpu__cpu_init() 2015-05-19 15:47:14 +02:00
.gitignore
Kbuild
Kconfig Initial ACPI support for arm64: 2015-04-24 08:23:45 -07:00
Kconfig.cpu
Kconfig.debug x86, intel-mid: remove Intel MID specific serial support 2015-03-07 03:25:18 +01:00
Makefile kbuild: use relative path more to include Makefile 2015-04-02 16:42:08 +02:00
Makefile_32.cpu
Makefile.um kbuild: use relative path more to include Makefile 2015-04-02 16:42:08 +02:00