linux-toradex.git/arch/um, branch v3.6.1

um: Preinclude include/linux/kern_levels.h

2012-09-27T18:20:09+00:00

The userspace part of UML uses the asm-offsets.h generator mechanism to
create definitions for UM_KERN_ that match the in-kernel
KERN_ constant definitions.

As of commit 04d2c8c83d0e3ac5f78aeede51babb3236200112 ("printk: convert
the format for KERN_ to a 2 byte pattern"), KERN_ is no
longer expanded to the literal '""', but to '"\001" "LEVEL"', i.e.
it contains two parts.

However, the combo of DEFINE_STR() in
arch/x86/um/shared/sysdep/kernel-offsets.h and sed-y in Kbuild doesn't
support string literals consisting of multiple parts. Hence for all
UM_KERN_ definitions, only the SOH character is retained in the actual
definition, while the remainder ends up in the comment. E.g. in
include/generated/asm-offsets.h we get

    #define UM_KERN_INFO "\001" /* "6" KERN_INFO */

instead of

    #define UM_KERN_INFO "\001" "6" /* KERN_INFO */

This causes spurious '^A' output in some kernel messages:

    Calibrating delay loop... 4640.76 BogoMIPS (lpj=23203840)
    pid_max: default: 32768 minimum: 301
    Mount-cache hash table entries: 256
    ^AChecking that host ptys support output SIGIO...Yes
    ^AChecking that host ptys support SIGIO on close...No, enabling workaround
    ^AUsing 2.6 host AIO
    NET: Registered protocol family 16
    bio: create slab  at 0
    Switching to clocksource itimer

To fix this:
  - Move the mapping from UM_KERN_ to KERN_ from
    arch/um/include/shared/common-offsets.h to
    arch/um/include/shared/user.h, which is preincluded for all userspace
    parts,
  - Preinclude include/linux/kern_levels.h for all userspace parts, to
    obtain the in-kernel KERN_ constant definitions. This doesn't
    violate the kernel/userspace separation, as include/linux/kern_levels.h
    is self-contained and doesn't expose any other kernel internals.
  - Remove the now unused STR() and DEFINE_STR() macros.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Richard Weinberger

um: kill thread->forking

2012-09-27T16:04:55+00:00

we only use that to tell copy_thread() done by syscall from that
done by kernel_thread().  However, it's easier to do simply by
checking PF_KTHREAD in thread flags.

Merge sys_clone() guts for 32bit and 64bit, while we are at it...

Signed-off-by: Al Viro

um: let signal_delivered() do SIGTRAP on singlestepping into handler

2012-09-27T16:04:47+00:00

... rather than duplicating that in sigframe setup code (and doing that
inconsistently, at that)

Signed-off-by: Al Viro

um: don't leak floating point state and segment registers on execve()

2012-09-27T16:04:38+00:00

Signed-off-by: Al Viro

um: take cleaning singlestep to start_thread()

2012-09-27T16:04:26+00:00

... assuming it's needed to be done at all

Signed-off-by: Al Viro

uml: fix compile error in deliver_alarm()

2012-09-06T02:40:59+00:00

Fix the following compile error on UML.

  arch/um/os-Linux/time.c: In function 'deliver_alarm':
  arch/um/os-Linux/time.c:117:3: error: too few arguments to function 'alarm_handler'
  arch/um/os-Linux/internal.h:1:6: note: declared here

The error was introduced by commit d3c1cfcd ("um: pass siginfo to guest
process") in 3.6-rc1.

Signed-off-by: Miklos Szeredi 
CC: Martin Pärtel 
Signed-off-by: Linus Torvalds

Merge branch 'for-linus-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

2012-08-01T23:45:02+00:00

Pull UML fixes from Richard Weinberger:
 "This patch set contains mostly fixes and cleanups.  The UML tty driver
  uses now tty_port and is no longer broken like hell  :-)"

* 'for-linus-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: Add arch/x86/um to MAINTAINERS
  um: pass siginfo to guest process
  um: fix ubd_file_size for read-only files
  um: pull interrupt_end() into userspace()
  um: split syscall_trace(), pass pt_regs to it
  um: switch UPT_SET_RETURN_VALUE and regs_return_value to pt_regs
  um: set BLK_CGROUP=y in defconfig
  um: remove count_lock
  um: fully use tty_port
  um: Remove dead code
  um: remove line_ioctl()
  TTY: um/line, use tty from tty_port
  TTY: um/line, add tty_port

um: pass siginfo to guest process

2012-08-01T22:49:17+00:00

UML guest processes now get correct siginfo_t for SIGTRAP, SIGFPE,
SIGILL and SIGBUS. Specifically, si_addr and si_code are now correct
where previously they were si_addr = NULL and si_code = 128.

Signed-off-by: Martin Pärtel 
Signed-off-by: Richard Weinberger

um: fix ubd_file_size for read-only files

2012-08-01T22:44:49+00:00

Made ubd_file_size not request write access. Fixes use of read-only images.

Signed-off-by: Martin Pärtel 
Signed-off-by: Richard Weinberger

um: pull interrupt_end() into userspace()

2012-08-01T22:25:44+00:00

Signed-off-by: Al Viro 
Signed-off-by: Richard Weinberger