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linux-next/arch/um/os-Linux
Jeff Dike 42daba3165 uml: stop saving process FP state
Throw out a lot of code dealing with saving and restoring floating-point
state.  In skas mode, where processes run in a restoring floating-point state
on kernel entry and exit is pointless.

This eliminates most of arch/um/os-Linux/sys-{i386,x86_64}/registers.c.  Most
of what remained is now arch-indpendent, and can be moved up to
arch/um/os-Linux/registers.c.  Both arches need the jmp_buf accessor
get_thread_reg, and i386 needs {save,restore}_fp_regs because it cheats during
sigreturn by getting the fp state using ptrace rather than copying it out of
the process sigcontext.

After this, it turns out that arch/um/include/skas/mode-skas.h is almost
completely unneeded.  The declarations in it are variables which either don't
exist or which don't have global scope.  The one exception is
kill_off_processes_skas.  If that's removed, this header can be deleted.

This uncovered a bug in user.h, which wasn't correctly making sure that a
size_t definition was available to both userspace and kernelspace files.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 09:43:05 -07:00
..
drivers uml: Eliminate kernel allocator wrappers 2007-07-16 09:05:38 -07:00
include Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
skas uml: stop saving process FP state 2007-10-16 09:43:05 -07:00
sys-i386 uml: stop saving process FP state 2007-10-16 09:43:05 -07:00
sys-x86_64 uml: stop saving process FP state 2007-10-16 09:43:05 -07:00
aio.c uml: fix aio compilation bug 2007-07-24 12:24:58 -07:00
elf_aux.c [PATCH] uml: host VDSO fix 2007-03-01 14:53:38 -08:00
execvp.c [PATCH] uml: make execvp safe for our usage 2006-11-25 13:28:34 -08:00
file.c uml: tidy recently-moved code 2007-10-16 09:43:04 -07:00
helper.c uml: Eliminate kernel allocator wrappers 2007-07-16 09:05:38 -07:00
irq.c uml: remove user_util.h 2007-05-07 12:13:01 -07:00
main.c uml: stop using libc asm/page.h 2007-10-16 09:43:04 -07:00
Makefile uml: stop saving process FP state 2007-10-16 09:43:05 -07:00
mem.c uml: convert libc layer to call read and write 2007-05-07 12:13:03 -07:00
process.c uml: more __init annotations 2007-07-24 12:24:58 -07:00
registers.c uml: stop saving process FP state 2007-10-16 09:43:05 -07:00
sigio.c uml: Eliminate kernel allocator wrappers 2007-07-16 09:05:38 -07:00
signal.c uml: fix irqstack crash 2007-09-19 11:24:18 -07:00
start_up.c uml: stop using libc asm/page.h 2007-10-16 09:43:04 -07:00
time.c uml: remove user_util.h 2007-05-07 12:13:01 -07:00
tls.c [PATCH] uml: include tidying 2006-11-03 12:27:59 -08:00
trap.c uml: remove user_util.h 2007-05-07 12:13:01 -07:00
tt.c uml: stop using libc asm/page.h 2007-10-16 09:43:04 -07:00
tty_log.c uml: convert libc layer to call read and write 2007-05-07 12:13:03 -07:00
tty.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
uaccess.c [PATCH] uml: Use klibc setjmp/longjmp 2006-09-26 08:49:05 -07:00
umid.c [PATCH] uml: umid tidying 2007-02-11 10:51:24 -08:00
user_syms.c uml: fix string exporting on UML/i386 2007-07-24 12:24:58 -07:00
util.c uml: remove task_protections 2007-05-11 08:29:33 -07:00