xtensa: only build __strncpy_user with CONFIG_ARCH_HAS_STRNCPY_FROM_USER

__strncpy_user is only used when CONFIG_ARCH_HAS_STRNCPY_FROM_USER is
enabled so don't build the source when it's off.

Signe

xtensa: only build __strncpy_user with CONFIG_ARCH_HAS_STRNCPY_FROM_USER

__strncpy_user is only used when CONFIG_ARCH_HAS_STRNCPY_FROM_USER is
enabled so don't build the source when it's off.

Signed-off-by: Max Filippov <[email protected]>

show more ...

xtensa: Remove 64 bits atomic builtins stubs

The stubs were provided by commit 725aea873261 ("xtensa: enable KCSAN")
to make linker happy allthought they are not meant to be used at all.

KCSAN core

xtensa: Remove 64 bits atomic builtins stubs

The stubs were provided by commit 725aea873261 ("xtensa: enable KCSAN")
to make linker happy allthought they are not meant to be used at all.

KCSAN core has been fixed to not require them anymore on
32 bits architectures.

Then they can be removed.

Signed-off-by: Christophe Leroy <[email protected]>
Acked-by: Max Filippov <[email protected]>
Acked-by: Marco Elver <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://msgid.link/a6834980e58c5e2cdf25b3db061f34975de46437.1683892665.git.christophe.leroy@csgroup.eu

show more ...

xtensa: add __bswap{si,di}2 helpers

gcc-13 may generate calls for __bswap{si,di}2. This breaks the kernel
build when optimization for size is selected. Add __bswap{si,di}2
helpers to fix that.

Cc:

xtensa: add __bswap{si,di}2 helpers

gcc-13 may generate calls for __bswap{si,di}2. This breaks the kernel
build when optimization for size is selected. Add __bswap{si,di}2
helpers to fix that.

Cc: [email protected]
Fixes: 19c5699f9aff ("xtensa: don't link with libgcc")
Signed-off-by: Max Filippov <[email protected]>

show more ...

xtensa: add __umulsidi3 helper

xtensa gcc-13 has changed multiplication handling and may now use
__umulsidi3 helper where it used to use __muldi3. As a result building
the kernel with the new gcc ma

xtensa: add __umulsidi3 helper

xtensa gcc-13 has changed multiplication handling and may now use
__umulsidi3 helper where it used to use __muldi3. As a result building
the kernel with the new gcc may fail with the following error:

linux/init/main.c:1287: undefined reference to `__umulsidi3'

Fix the build by providing __umulsidi3 implementation for xtensa.

Cc: [email protected] # 5.18+
Signed-off-by: Max Filippov <[email protected]>

show more ...

xtensa: enable KCSAN

Prefix arch-specific barrier macros with '__' to make use of instrumented
generic macros.
Prefix arch-specific bitops with 'arch_' to make use of instrumented
generic functions.

xtensa: enable KCSAN

Prefix arch-specific barrier macros with '__' to make use of instrumented
generic macros.
Prefix arch-specific bitops with 'arch_' to make use of instrumented
generic functions.
Provide stubs for 64-bit atomics when building with KCSAN.
Disable KCSAN instrumentation in arch/xtensa/boot.

Signed-off-by: Max Filippov <[email protected]>
Acked-by: Marco Elver <[email protected]>

show more ...

xtensa: add helpers for division, remainder and shifts

Don't rely on libgcc presence, build own versions of the helpers with
correct ABI.

Signed-off-by: Max Filippov <[email protected]>

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

GPL-2.0-only

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

[STRING]: Move strcasecmp/strncasecmp to lib/string.c

We have several platforms using local copies of identical
code.

Signed-off-by: David S. Miller <[email protected]>

[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 4

The attached patches provides part 4 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zan

[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 4

The attached patches provides part 4 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...