WSL2-Linux-Kernel/arch/um/sys-i386
Jeff Dike 16dd07bc64 uml: more page fault path trimming
More trimming of the page fault path.

Permissions are passed around in a single int rather than one bit per
int.  The permission values are copied from libc so that they can be
passed to mmap and mprotect without any further conversion.

The register sets used by do_syscall_stub and copy_context_skas0 are
initialized once, at boot time, rather than once per call.

wait_stub_done checks whether it is getting the signals it expects by
comparing the wait status to a mask containing bits for the signals of
interest rather than comparing individually to the signal numbers.  It
also has one check for a wait failure instead of two.  The caller is
expected to do the initial continue of the stub.  This gets rid of an
argument and some logic.  The fname argument is gone, as that can be
had from a stack trace.

user_signal() is collapsed into userspace() as it is basically one or
two lines of code afterwards.

The physical memory remapping stuff is gone, as it is unused.

flush_tlb_page is inlined.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-07 12:13:04 -07:00
..
Makefile [PATCH] UML: add generic BUG support 2006-12-08 08:28:39 -08:00
bug.c [PATCH] UML: add generic BUG support 2006-12-08 08:28:39 -08:00
bugs.c uml: rename os_{read_write}_file_k back to os_{read_write}_file 2007-05-07 12:13:03 -07:00
checksum.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
delay.c [PATCH] uml: fix unreasonably long udelay 2007-04-02 10:06:08 -07:00
fault.c uml: tidy fault code 2007-05-07 12:13:02 -07:00
ksyms.c [PATCH] uml: fix some double export warnings 2006-04-11 06:18:36 -07:00
ldt.c uml: rename os_{read_write}_file_k back to os_{read_write}_file 2007-05-07 12:13:03 -07:00
ptrace.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ptrace_user.c uml: remove user_util.h 2007-05-07 12:13:01 -07:00
setjmp.S [PATCH] uml: Use klibc setjmp/longjmp 2006-09-26 08:49:05 -07:00
sigcontext.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal.c uml: kernel segfaults should dump proper registers 2007-05-07 12:13:02 -07:00
stub.S [PATCH] uml: skas0 stubs now check system call return values 2005-09-05 00:06:24 -07:00
stub_segv.c [PATCH] uml: add missing __volatile__ 2006-04-19 09:13:51 -07:00
sys_call_table.S [PATCH] uml: remove unneeded time definitions 2006-06-30 11:25:38 -07:00
syscalls.c [PATCH] uml: more __user annotations 2006-06-05 12:29:17 -07:00
sysrq.c Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
tls.c uml: no locking needed in tls.c 2007-05-07 12:13:02 -07:00
unmap.c [PATCH] Fix "Remove the use of _syscallX macros in UML" 2006-10-30 12:08:41 -08:00
user-offsets.c uml: more page fault path trimming 2007-05-07 12:13:04 -07:00