linux.git/arch/um/include/asm, branch v5.17 Linux kernel source tree um: remove set_fs 2021-12-22T16:56:56+00:00 Christoph Hellwig hch@lst.de 2021-12-15T16:56:12+00:00 8bb227ac34c062b466a0d5fd21f060010375880b Remove address space overrides using set_fs() for User Mode Linux. Note that just like the existing kernel access case of the uaccess routines the new nofault kernel handlers do not actually have any exception handling. This is probably broken, but not change to the status quo. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Richard Weinberger <richard@nod.at> 
Remove address space overrides using set_fs() for User Mode Linux.
Note that just like the existing kernel access case of the uaccess
routines the new nofault kernel handlers do not actually have any
exception handling.  This is probably broken, but not change to the
status quo.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: stop polluting the namespace with registers.h contents 2021-12-21T20:31:35+00:00 Al Viro viro@zeniv.linux.org.uk 2021-09-20T21:32:50+00:00 dbba7f704aa0c38e36c9908012e7592c8f6efc43 Only one extern in there is needed in processor-generic.h, and it's not needed anywhere else. So move it over there and get rid of the include in processor-generic.h, adding includes of registers.h to the few files that need the declarations in it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Only one extern in there is needed in processor-generic.h, and it's
not needed anywhere else.  So move it over there and get rid of
the include in processor-generic.h, adding includes of registers.h
to the few files that need the declarations in it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: rename set_signals() to um_set_signals() 2021-12-21T20:13:44+00:00 Johannes Berg johannes.berg@intel.com 2021-08-31T07:11:15+00:00 bbe33504d4a7fdab9011211e55e262c869b3f6cc Rename set_signals() as there's at least one driver that uses the same name and can now be built on UM due to PCI support, and thus we can get symbol conflicts. Also rename set_signals_trace() to be consistent. Reported-by: kernel test robot <lkp@intel.com> Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
Rename set_signals() as there's at least one driver that
uses the same name and can now be built on UM due to PCI
support, and thus we can get symbol conflicts.

Also rename set_signals_trace() to be consistent.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: fix ndelay/udelay defines 2021-12-21T20:13:43+00:00 Johannes Berg johannes.berg@intel.com 2021-08-31T07:27:53+00:00 5f8539e2ff962e25b57742ca7106456403abbc94 Many places in the kernel use 'udelay' as an identifier, and are broken with the current "#define udelay um_udelay". Fix this by adding an argument to the macro, and do the same to 'ndelay' as well, just in case. Fixes: 0bc8fb4dda2b ("um: Implement ndelay/udelay in time-travel mode") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
Many places in the kernel use 'udelay' as an identifier, and
are broken with the current "#define udelay um_udelay". Fix
this by adding an argument to the macro, and do the same to
'ndelay' as well, just in case.

Fixes: 0bc8fb4dda2b ("um: Implement ndelay/udelay in time-travel mode")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Merge tag 'asm-generic-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2021-11-10T19:22:03+00:00 Linus Torvalds torvalds@linux-foundation.org 2021-11-10T19:22:03+00:00 e8f023caee6b03b796dea65ac379f895be9719ac Pull asm-generic cleanup from Arnd Bergmann: "This is a single cleanup from Peter Collingbourne, removing some dead code" * tag 'asm-generic-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: arch: remove unused function syscall_set_arguments() 
Pull asm-generic cleanup from Arnd Bergmann:
 "This is a single cleanup from Peter Collingbourne, removing some dead
  code"

* tag 'asm-generic-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  arch: remove unused function syscall_set_arguments()
sched: Add wrapper for get_wchan() to keep task blocked 2021-10-15T09:25:14+00:00 Kees Cook keescook@chromium.org 2021-09-29T22:02:14+00:00 42a20f86dc19f9282d974df0ba4d226c865ab9dd Having a stable wchan means the process must be blocked and for it to stay that way while performing stack unwinding. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> [arm] Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Link: https://lkml.kernel.org/r/20211008111626.332092234@infradead.org 
Having a stable wchan means the process must be blocked and for it to
stay that way while performing stack unwinding.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> [arm]
Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64]
Link: https://lkml.kernel.org/r/20211008111626.332092234@infradead.org
arch: remove unused function syscall_set_arguments() 2021-09-14T14:06:20+00:00 Peter Collingbourne pcc@google.com 2021-09-13T22:24:47+00:00 7962c2eddbfe7cce879acb06f9b4f205789e57b7 This function appears to have been unused since it was first introduced in commit 828c365cc8b8 ("tracehook: asm/syscall.h"). Signed-off-by: Peter Collingbourne <pcc@google.com> Link: https://linux-review.googlesource.com/id/I8ce04f002903a37c0b6c1d16e9b2a3afa716c097 Signed-off-by: Arnd Bergmann <arnd@arndb.de> 
This function appears to have been unused since it was first introduced in
commit 828c365cc8b8 ("tracehook: asm/syscall.h").

Signed-off-by: Peter Collingbourne <pcc@google.com>
Link: https://linux-review.googlesource.com/id/I8ce04f002903a37c0b6c1d16e9b2a3afa716c097
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
asm-generic: remove extra strn{cpy_from,len}_user declarations 2021-07-27T21:01:13+00:00 Arnd Bergmann arnd@arndb.de 2020-01-17T16:26:54+00:00 166ec4633b63c69fabc5d8d745a1c5b73fb53f1d As these are now in asm-generic, it's no longer necessary to declare them in the architecture. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> 
As these are now in asm-generic, it's no longer necessary to
declare them in the architecture.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
asm-generic/uaccess.h: remove __strncpy_from_user/__strnlen_user 2021-07-23T12:39:56+00:00 Arnd Bergmann arnd@arndb.de 2020-01-16T12:18:38+00:00 f27180dd63e1e6eca3230b9d3fdcc33564a81117 This is a preparation for changing over architectures to the generic implementation one at a time. As there are no callers of either __strncpy_from_user() or __strnlen_user(), fold these into the strncpy_from_user() and strnlen_user() functions to make each implementation independent of the others. Many of these implementations have known bugs, but the intention here is to not change behavior at all and stay compatible with those bugs for the moment. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> 
This is a preparation for changing over architectures to the
generic implementation one at a time. As there are no callers
of either __strncpy_from_user() or __strnlen_user(), fold these
into the strncpy_from_user() and strnlen_user() functions to make
each implementation independent of the others.

Many of these implementations have known bugs, but the intention
here is to not change behavior at all and stay compatible with
those bugs for the moment.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Merge tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml 2021-07-09T17:19:13+00:00 Linus Torvalds torvalds@linux-foundation.org 2021-07-09T17:19:13+00:00 dcf3c935dd9e8e76c9922e88672fa4ad6a8a4df8 Pull UML updates from Richard Weinberger: - Support for optimized routines based on the host CPU - Support for PCI via virtio - Various fixes * tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: remove unneeded semicolon in um_arch.c um: Remove the repeated declaration um: fix error return code in winch_tramp() um: fix error return code in slip_open() um: Fix stack pointer alignment um: implement flush_cache_vmap/flush_cache_vunmap um: add a UML specific futex implementation um: enable the use of optimized xor routines in UML um: Add support for host CPU flags and alignment um: allow not setting extra rpaths in the linux binary um: virtio/pci: enable suspend/resume um: add PCI over virtio emulation driver um: irqs: allow invoking time-travel handler multiple times um: time-travel/signals: fix ndelay() in interrupt um: expose time-travel mode to userspace side um: export signals_enabled directly um: remove unused smp_sigio_handler() declaration lib: add iomem emulation (logic_iomem) um: allow disabling NO_IOMEM 
Pull UML updates from Richard Weinberger:

 - Support for optimized routines based on the host CPU

 - Support for PCI via virtio

 - Various fixes

* tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: remove unneeded semicolon in um_arch.c
  um: Remove the repeated declaration
  um: fix error return code in winch_tramp()
  um: fix error return code in slip_open()
  um: Fix stack pointer alignment
  um: implement flush_cache_vmap/flush_cache_vunmap
  um: add a UML specific futex implementation
  um: enable the use of optimized xor routines in UML
  um: Add support for host CPU flags and alignment
  um: allow not setting extra rpaths in the linux binary
  um: virtio/pci: enable suspend/resume
  um: add PCI over virtio emulation driver
  um: irqs: allow invoking time-travel handler multiple times
  um: time-travel/signals: fix ndelay() in interrupt
  um: expose time-travel mode to userspace side
  um: export signals_enabled directly
  um: remove unused smp_sigio_handler() declaration
  lib: add iomem emulation (logic_iomem)
  um: allow disabling NO_IOMEM