diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-10-16 01:26:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:05 -0700 |
| commit | 42daba316557e597a90a730f61c762602b7f0e0c (patch) | |
| tree | 9b7e9da84cef7d2547c577f1cf94b408cf308619 /arch/um/include/registers.h | |
| parent | 5c8aaceab88ac787c0a4038b29143c954c2a45e0 (diff) | |
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>
Diffstat (limited to 'arch/um/include/registers.h')
| -rw-r--r-- | arch/um/include/registers.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/um/include/registers.h b/arch/um/include/registers.h index f845b3629a6..b7d2c4e2c61 100644 --- a/arch/um/include/registers.h +++ b/arch/um/include/registers.h @@ -15,7 +15,7 @@ extern int restore_fp_registers(int pid, unsigned long *fp_regs); extern void save_registers(int pid, union uml_pt_regs *regs); extern void restore_registers(int pid, union uml_pt_regs *regs); extern void init_registers(int pid); -extern void get_safe_registers(unsigned long * regs, unsigned long * fp_regs); +extern void get_safe_registers(unsigned long *regs); extern unsigned long get_thread_reg(int reg, jmp_buf *buf); #endif |