linux.git/arch/um/include/asm/processor-generic.h, branch v6.0 Linux kernel source tree um: remove unused mm_copy_segments 2022-07-17T21:31:30+00:00 Tobias Klauser tklauser@distanz.ch 2022-06-21T10:21:18+00:00 53078ceb8d0e530ab360896511005628e69ae896 It was already removed by commit c17c02040bf0 ("arch: remove unused *_segments() macros/functions") but seems to have been accidentally reintroduced by commit 0500871f21b2 ("Construct init thread stack in the linker script rather than by union"). Remove it for good. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Richard Weinberger <richard@nod.at> 
It was already removed by commit c17c02040bf0 ("arch: remove unused
*_segments() macros/functions") but seems to have been accidentally
reintroduced by commit 0500871f21b2 ("Construct init thread stack in the
linker script rather than by union"). Remove it for good.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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>
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
um: Add support for host CPU flags and alignment 2021-06-17T20:01:26+00:00 Anton Ivanov anton.ivanov@cambridgegreys.com 2021-03-12T15:16:07+00:00 d8fb32f4790f2a286e58db8548016378ac35fc6f 1. Reflect host cpu flags into the UML instance so they can be used to select the correct implementations for xor, crypto, etc. 2. Reflect host cache alignment into UML instance. This is important when running 32 bit on a 64 bit host as 32 bit by default aligns to 32 while the actual alignment should be 64. Ditto for some Xeons which align at 128. Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
1. Reflect host cpu flags into the UML instance so they can
be used to select the correct implementations for xor, crypto, etc.

2. Reflect host cache alignment into UML instance. This is
important when running 32 bit on a 64 bit host as 32 bit by
default aligns to 32 while the actual alignment should be 64.
Ditto for some Xeons which align at 128.

Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Add SPDX headers for files in arch/um/include 2019-09-15T19:37:17+00:00 Alex Dewar alex.dewar@gmx.co.uk 2019-08-25T09:49:19+00:00 f2f4bf5aabadd6575f5daabcb0a2f506e3f5f68c Convert files to use SPDX header. All files are licensed under the GPLv2. Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Convert files to use SPDX header. All files are licensed under the GPLv2.

Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
Construct init thread stack in the linker script rather than by union 2018-01-09T23:21:02+00:00 David Howells dhowells@redhat.com 2018-01-02T15:12:01+00:00 0500871f21b237b2bea2d9db405eadf78e5aab05 Construct the init thread stack in the linker script rather than doing it by means of a union so that ia64's init_task.c can be got rid of. The following symbols are then made available from INIT_TASK_DATA() linker script macro: init_thread_union init_stack INIT_TASK_DATA() also expands the region to THREAD_SIZE to accommodate the size of the init stack. init_thread_union is given its own section so that it can be placed into the stack space in the right order. I'm assuming that the ia64 ordering is correct and that the task_struct is first and the thread_info second. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com> Tested-by: Will Deacon <will.deacon@arm.com> (arm64) Tested-by: Palmer Dabbelt <palmer@sifive.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> 
Construct the init thread stack in the linker script rather than doing it
by means of a union so that ia64's init_task.c can be got rid of.

The following symbols are then made available from INIT_TASK_DATA() linker
script macro:

	init_thread_union
	init_stack

INIT_TASK_DATA() also expands the region to THREAD_SIZE to accommodate the
size of the init stack.  init_thread_union is given its own section so that
it can be placed into the stack space in the right order.  I'm assuming
that the ia64 ordering is correct and that the task_struct is first and the
thread_info second.

Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Tested-by: Will Deacon <will.deacon@arm.com> (arm64)
Tested-by: Palmer Dabbelt <palmer@sifive.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
arch: remove unused *_segments() macros/functions 2017-09-22T22:59:52+00:00 Tobias Klauser tklauser@distanz.ch 2017-09-22T07:42:42+00:00 c17c02040bf0d186cebd3e66ff349f955575bf38 Some architectures define the no-op macros/functions copy_segments, release_segments and forget_segments. These are used nowhere in the tree, so removed them. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Vineet Gupta <vgupta@synopsys.com> [for arch/arc] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Some architectures define the no-op macros/functions copy_segments,
release_segments and forget_segments. These are used nowhere in the
tree, so removed them.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Vineet Gupta <vgupta@synopsys.com>   [for arch/arc]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch: remove unused macro/function thread_saved_pc() 2017-06-28T23:13:57+00:00 Tobias Klauser tklauser@distanz.ch 2017-06-28T13:30:02+00:00 6474924e2b5ddb0030c355558966adcbe3b49022 The only user of thread_saved_pc() in non-arch-specific code was removed in commit 8243d5597793 ("sched/core: Remove pointless printout in sched_show_task()"). Remove the implementations as well. Some architectures use thread_saved_pc() in their arch-specific code. Leave their thread_saved_pc() intact. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
The only user of thread_saved_pc() in non-arch-specific code was removed
in commit 8243d5597793 ("sched/core: Remove pointless printout in
sched_show_task()").  Remove the implementations as well.

Some architectures use thread_saved_pc() in their arch-specific code.
Leave their thread_saved_pc() intact.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
um: Remove broken SMP support 2015-04-13T19:00:58+00:00 Richard Weinberger richard@nod.at 2015-03-18T20:42:54+00:00 28fa468f53163bc0b867b4cc75a9e36e7ed4dbbd At times where UML used the TT mode to operate it had kind of SMP support. It never got finished nor was stable. Let's rip out that cruft and stop confusing developers which do tree-wide SMP cleanups. If someone wants SMP support UML it has do be done from scratch. Signed-off-by: Richard Weinberger <richard@nod.at> 
At times where UML used the TT mode to operate it had
kind of SMP support. It never got finished nor was
stable.
Let's rip out that cruft and stop confusing developers
which do tree-wide SMP cleanups.

If someone wants SMP support UML it has do be done from scratch.

Signed-off-by: Richard Weinberger <richard@nod.at>
um: Removed unused attributes from thread_struct 2014-01-26T10:48:37+00:00 Richard Weinberger richard@nod.at 2013-09-13T17:25:11+00:00 61aad98a7f0c48ac4cece3de3d403d521721afe8 temp_stack and mm_count have no users and can be killed. Signed-off-by: Richard Weinberger <richard@nod.at> 
temp_stack and mm_count have no users and can be killed.

Signed-off-by: Richard Weinberger <richard@nod.at>