<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux.git/arch/arm/lib/Makefile, branch v6.16</title>
<subtitle>Linux kernel source tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/'/>
<entry>
<title>Merge tag 'v6.16-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6</title>
<updated>2025-05-26T20:47:28+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2025-05-26T20:47:28+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=14418ddcc2c2055743ac7ee53d5ac2cf8a8660a7'/>
<id>14418ddcc2c2055743ac7ee53d5ac2cf8a8660a7</id>
<content type='text'>
Pull crypto updates from Herbert Xu:
 "API:
   - Fix memcpy_sglist to handle partially overlapping SG lists
   - Use memcpy_sglist to replace null skcipher
   - Rename CRYPTO_TESTS to CRYPTO_BENCHMARK
   - Flip CRYPTO_MANAGER_DISABLE_TEST into CRYPTO_SELFTESTS
   - Hide CRYPTO_MANAGER
   - Add delayed freeing of driver crypto_alg structures

  Compression:
   - Allocate large buffers on first use instead of initialisation in scomp
   - Drop destination linearisation buffer in scomp
   - Move scomp stream allocation into acomp
   - Add acomp scatter-gather walker
   - Remove request chaining
   - Add optional async request allocation

  Hashing:
   - Remove request chaining
   - Add optional async request allocation
   - Move partial block handling into API
   - Add ahash support to hmac
   - Fix shash documentation to disallow usage in hard IRQs

  Algorithms:
   - Remove unnecessary SIMD fallback code on x86 and arm/arm64
   - Drop avx10_256 xts(aes)/ctr(aes) on x86
   - Improve avx-512 optimisations for xts(aes)
   - Move chacha arch implementations into lib/crypto
   - Move poly1305 into lib/crypto and drop unused Crypto API algorithm
   - Disable powerpc/poly1305 as it has no SIMD fallback
   - Move sha256 arch implementations into lib/crypto
   - Convert deflate to acomp
   - Set block size correctly in cbcmac

  Drivers:
   - Do not use sg_dma_len before mapping in sun8i-ss
   - Fix warm-reboot failure by making shutdown do more work in qat
   - Add locking in zynqmp-sha
   - Remove cavium/zip
   - Add support for PCI device 0x17D8 to ccp
   - Add qat_6xxx support in qat
   - Add support for RK3576 in rockchip-rng
   - Add support for i.MX8QM in caam

  Others:
   - Fix irq_fpu_usable/kernel_fpu_begin inconsistency during CPU bring-up
   - Add new SEV/SNP platform shutdown API in ccp"

* tag 'v6.16-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (382 commits)
  x86/fpu: Fix irq_fpu_usable() to return false during CPU onlining
  crypto: qat - add missing header inclusion
  crypto: api - Redo lookup on EEXIST
  Revert "crypto: testmgr - Add hash export format testing"
  crypto: marvell/cesa - Do not chain submitted requests
  crypto: powerpc/poly1305 - add depends on BROKEN for now
  Revert "crypto: powerpc/poly1305 - Add SIMD fallback"
  crypto: ccp - Add missing tee info reg for teev2
  crypto: ccp - Add missing bootloader info reg for pspv5
  crypto: sun8i-ce - move fallback ahash_request to the end of the struct
  crypto: octeontx2 - Use dynamic allocated memory region for lmtst
  crypto: octeontx2 - Initialize cptlfs device info once
  crypto: xts - Only add ecb if it is not already there
  crypto: lrw - Only add ecb if it is not already there
  crypto: testmgr - Add hash export format testing
  crypto: testmgr - Use ahash for generic tfm
  crypto: hmac - Add ahash support
  crypto: testmgr - Ignore EEXIST on shash allocation
  crypto: algapi - Add driver template support to crypto_inst_setname
  crypto: shash - Set reqsize in shash_alg
  ...
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull crypto updates from Herbert Xu:
 "API:
   - Fix memcpy_sglist to handle partially overlapping SG lists
   - Use memcpy_sglist to replace null skcipher
   - Rename CRYPTO_TESTS to CRYPTO_BENCHMARK
   - Flip CRYPTO_MANAGER_DISABLE_TEST into CRYPTO_SELFTESTS
   - Hide CRYPTO_MANAGER
   - Add delayed freeing of driver crypto_alg structures

  Compression:
   - Allocate large buffers on first use instead of initialisation in scomp
   - Drop destination linearisation buffer in scomp
   - Move scomp stream allocation into acomp
   - Add acomp scatter-gather walker
   - Remove request chaining
   - Add optional async request allocation

  Hashing:
   - Remove request chaining
   - Add optional async request allocation
   - Move partial block handling into API
   - Add ahash support to hmac
   - Fix shash documentation to disallow usage in hard IRQs

  Algorithms:
   - Remove unnecessary SIMD fallback code on x86 and arm/arm64
   - Drop avx10_256 xts(aes)/ctr(aes) on x86
   - Improve avx-512 optimisations for xts(aes)
   - Move chacha arch implementations into lib/crypto
   - Move poly1305 into lib/crypto and drop unused Crypto API algorithm
   - Disable powerpc/poly1305 as it has no SIMD fallback
   - Move sha256 arch implementations into lib/crypto
   - Convert deflate to acomp
   - Set block size correctly in cbcmac

  Drivers:
   - Do not use sg_dma_len before mapping in sun8i-ss
   - Fix warm-reboot failure by making shutdown do more work in qat
   - Add locking in zynqmp-sha
   - Remove cavium/zip
   - Add support for PCI device 0x17D8 to ccp
   - Add qat_6xxx support in qat
   - Add support for RK3576 in rockchip-rng
   - Add support for i.MX8QM in caam

  Others:
   - Fix irq_fpu_usable/kernel_fpu_begin inconsistency during CPU bring-up
   - Add new SEV/SNP platform shutdown API in ccp"

* tag 'v6.16-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (382 commits)
  x86/fpu: Fix irq_fpu_usable() to return false during CPU onlining
  crypto: qat - add missing header inclusion
  crypto: api - Redo lookup on EEXIST
  Revert "crypto: testmgr - Add hash export format testing"
  crypto: marvell/cesa - Do not chain submitted requests
  crypto: powerpc/poly1305 - add depends on BROKEN for now
  Revert "crypto: powerpc/poly1305 - Add SIMD fallback"
  crypto: ccp - Add missing tee info reg for teev2
  crypto: ccp - Add missing bootloader info reg for pspv5
  crypto: sun8i-ce - move fallback ahash_request to the end of the struct
  crypto: octeontx2 - Use dynamic allocated memory region for lmtst
  crypto: octeontx2 - Initialize cptlfs device info once
  crypto: xts - Only add ecb if it is not already there
  crypto: lrw - Only add ecb if it is not already there
  crypto: testmgr - Add hash export format testing
  crypto: testmgr - Use ahash for generic tfm
  crypto: hmac - Add ahash support
  crypto: testmgr - Ignore EEXIST on shash allocation
  crypto: algapi - Add driver template support to crypto_inst_setname
  crypto: shash - Set reqsize in shash_alg
  ...
</pre>
</div>
</content>
</entry>
<entry>
<title>arm/crc: drop "glue" from filenames</title>
<updated>2025-04-28T16:07:19+00:00</updated>
<author>
<name>Eric Biggers</name>
<email>ebiggers@google.com</email>
</author>
<published>2025-04-24T00:20:32+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=6cc25e4b7c819c183a21d6b9a4bcec84229131d1'/>
<id>6cc25e4b7c819c183a21d6b9a4bcec84229131d1</id>
<content type='text'>
The use of the term "glue" in filenames is a Crypto API-ism that rarely
shows up elsewhere in lib/ or arch/*/lib/.  I think adopting it there
was a mistake.  The library just uses standard functions, so the amount
of code that could be considered "glue" is quite small.  And while often
the C functions just wrap the assembly functions, there are also cases
like crc32c_arch() in arch/x86/lib/crc32-glue.c that blur the line by
in-lining the actual implementation into the C function.  That's not
"glue code", but rather the actual code.

Therefore, let's drop "glue" from the filenames and instead use e.g.
crc32.c instead of crc32-glue.c.

Reviewed-by: "Martin K. Petersen" &lt;martin.petersen@oracle.com&gt;
Acked-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Link: https://lore.kernel.org/r/20250424002038.179114-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers &lt;ebiggers@google.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The use of the term "glue" in filenames is a Crypto API-ism that rarely
shows up elsewhere in lib/ or arch/*/lib/.  I think adopting it there
was a mistake.  The library just uses standard functions, so the amount
of code that could be considered "glue" is quite small.  And while often
the C functions just wrap the assembly functions, there are also cases
like crc32c_arch() in arch/x86/lib/crc32-glue.c that blur the line by
in-lining the actual implementation into the C function.  That's not
"glue code", but rather the actual code.

Therefore, let's drop "glue" from the filenames and instead use e.g.
crc32.c instead of crc32-glue.c.

Reviewed-by: "Martin K. Petersen" &lt;martin.petersen@oracle.com&gt;
Acked-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Link: https://lore.kernel.org/r/20250424002038.179114-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers &lt;ebiggers@google.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>crypto: arm - move library functions to arch/arm/lib/crypto/</title>
<updated>2025-04-28T11:40:53+00:00</updated>
<author>
<name>Eric Biggers</name>
<email>ebiggers@google.com</email>
</author>
<published>2025-04-22T15:27:08+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=714656a84697f9615b9488b490c99edb3ecfcd3d'/>
<id>714656a84697f9615b9488b490c99edb3ecfcd3d</id>
<content type='text'>
Continue disentangling the crypto library functions from the generic
crypto infrastructure by moving the arm BLAKE2s, ChaCha, and Poly1305
library functions into a new directory arch/arm/lib/crypto/ that does
not depend on CRYPTO.  This mirrors the distinction between crypto/ and
lib/crypto/.

Signed-off-by: Eric Biggers &lt;ebiggers@google.com&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Continue disentangling the crypto library functions from the generic
crypto infrastructure by moving the arm BLAKE2s, ChaCha, and Poly1305
library functions into a new directory arch/arm/lib/crypto/ that does
not depend on CRYPTO.  This mirrors the distinction between crypto/ and
lib/crypto/.

Signed-off-by: Eric Biggers &lt;ebiggers@google.com&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm/crc-t10dif: expose CRC-T10DIF function through lib</title>
<updated>2024-12-02T01:23:13+00:00</updated>
<author>
<name>Eric Biggers</name>
<email>ebiggers@google.com</email>
</author>
<published>2024-12-02T01:20:49+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=1684e8293605062dee45a5e4118fe8db6cd0d9d9'/>
<id>1684e8293605062dee45a5e4118fe8db6cd0d9d9</id>
<content type='text'>
Move the arm CRC-T10DIF assembly code into the lib directory and wire it
up to the library interface.  This allows it to be used without going
through the crypto API.  It remains usable via the crypto API too via
the shash algorithms that use the library interface.  Thus all the
arch-specific "shash" code becomes unnecessary and is removed.

Note: to see the diff from arch/arm/crypto/crct10dif-ce-glue.c to
arch/arm/lib/crc-t10dif-glue.c, view this commit with 'git show -M10'.

Reviewed-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Reviewed-by: Martin K. Petersen &lt;martin.petersen@oracle.com&gt;
Link: https://lore.kernel.org/r/20241202012056.209768-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers &lt;ebiggers@google.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Move the arm CRC-T10DIF assembly code into the lib directory and wire it
up to the library interface.  This allows it to be used without going
through the crypto API.  It remains usable via the crypto API too via
the shash algorithms that use the library interface.  Thus all the
arch-specific "shash" code becomes unnecessary and is removed.

Note: to see the diff from arch/arm/crypto/crct10dif-ce-glue.c to
arch/arm/lib/crc-t10dif-glue.c, view this commit with 'git show -M10'.

Reviewed-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Reviewed-by: Martin K. Petersen &lt;martin.petersen@oracle.com&gt;
Link: https://lore.kernel.org/r/20241202012056.209768-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers &lt;ebiggers@google.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm/crc32: expose CRC32 functions through lib</title>
<updated>2024-12-02T01:23:01+00:00</updated>
<author>
<name>Eric Biggers</name>
<email>ebiggers@google.com</email>
</author>
<published>2024-12-02T01:08:30+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=1e1b6dbc3d9c152df818f3e560f96839a901ebce'/>
<id>1e1b6dbc3d9c152df818f3e560f96839a901ebce</id>
<content type='text'>
Move the arm CRC32 assembly code into the lib directory and wire it up
to the library interface.  This allows it to be used without going
through the crypto API.  It remains usable via the crypto API too via
the shash algorithms that use the library interface.  Thus all the
arch-specific "shash" code becomes unnecessary and is removed.

Note: to see the diff from arch/arm/crypto/crc32-ce-glue.c to
arch/arm/lib/crc32-glue.c, view this commit with 'git show -M10'.

Reviewed-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Link: https://lore.kernel.org/r/20241202010844.144356-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers &lt;ebiggers@google.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Move the arm CRC32 assembly code into the lib directory and wire it up
to the library interface.  This allows it to be used without going
through the crypto API.  It remains usable via the crypto API too via
the shash algorithms that use the library interface.  Thus all the
arch-specific "shash" code becomes unnecessary and is removed.

Note: to see the diff from arch/arm/crypto/crc32-ce-glue.c to
arch/arm/lib/crc32-glue.c, view this commit with 'git show -M10'.

Reviewed-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Link: https://lore.kernel.org/r/20241202010844.144356-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers &lt;ebiggers@google.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: crypto: use CC_FLAGS_FPU for NEON CFLAGS</title>
<updated>2024-05-19T21:36:17+00:00</updated>
<author>
<name>Samuel Holland</name>
<email>samuel.holland@sifive.com</email>
</author>
<published>2024-03-29T07:18:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=c41624315b602da32f59e70baa825c5f11fea892'/>
<id>c41624315b602da32f59e70baa825c5f11fea892</id>
<content type='text'>
Now that CC_FLAGS_FPU is exported and can be used anywhere in the source
tree, use it instead of duplicating the flags here.

Link: https://lkml.kernel.org/r/20240329072441.591471-4-samuel.holland@sifive.com
Signed-off-by: Samuel Holland &lt;samuel.holland@sifive.com&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Acked-by: Christian König &lt;christian.koenig@amd.com&gt; 
Cc: Alex Deucher &lt;alexander.deucher@amd.com&gt;
Cc: Borislav Petkov (AMD) &lt;bp@alien8.de&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Cc: Dave Hansen &lt;dave.hansen@linux.intel.com&gt;
Cc: Huacai Chen &lt;chenhuacai@kernel.org&gt;
Cc: Ingo Molnar &lt;mingo@redhat.com&gt;
Cc: Jonathan Corbet &lt;corbet@lwn.net&gt;
Cc: Masahiro Yamada &lt;masahiroy@kernel.org&gt;
Cc: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
Cc: Nathan Chancellor &lt;nathan@kernel.org&gt;
Cc: Nicolas Schier &lt;nicolas@fjasle.eu&gt;
Cc: Palmer Dabbelt &lt;palmer@rivosinc.com&gt;
Cc: Russell King &lt;linux@armlinux.org.uk&gt;
Cc: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Cc: WANG Xuerui &lt;git@xen0n.name&gt;
Cc: Will Deacon &lt;will@kernel.org&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Now that CC_FLAGS_FPU is exported and can be used anywhere in the source
tree, use it instead of duplicating the flags here.

Link: https://lkml.kernel.org/r/20240329072441.591471-4-samuel.holland@sifive.com
Signed-off-by: Samuel Holland &lt;samuel.holland@sifive.com&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Acked-by: Christian König &lt;christian.koenig@amd.com&gt; 
Cc: Alex Deucher &lt;alexander.deucher@amd.com&gt;
Cc: Borislav Petkov (AMD) &lt;bp@alien8.de&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Cc: Dave Hansen &lt;dave.hansen@linux.intel.com&gt;
Cc: Huacai Chen &lt;chenhuacai@kernel.org&gt;
Cc: Ingo Molnar &lt;mingo@redhat.com&gt;
Cc: Jonathan Corbet &lt;corbet@lwn.net&gt;
Cc: Masahiro Yamada &lt;masahiroy@kernel.org&gt;
Cc: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
Cc: Nathan Chancellor &lt;nathan@kernel.org&gt;
Cc: Nicolas Schier &lt;nicolas@fjasle.eu&gt;
Cc: Palmer Dabbelt &lt;palmer@rivosinc.com&gt;
Cc: Russell King &lt;linux@armlinux.org.uk&gt;
Cc: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Cc: WANG Xuerui &lt;git@xen0n.name&gt;
Cc: Will Deacon &lt;will@kernel.org&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: 9279/1: support function error injection</title>
<updated>2022-12-07T14:08:38+00:00</updated>
<author>
<name>Wang Kefeng</name>
<email>wangkefeng.wang@huawei.com</email>
</author>
<published>2022-12-04T03:46:40+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=aaa4dd1b47f5ff5ef477fec5dcc6c397b457f1c2'/>
<id>aaa4dd1b47f5ff5ef477fec5dcc6c397b457f1c2</id>
<content type='text'>
This enables HAVE_FUNCTION_ERROR_INJECTION by adding necessary
regs_set_return_value() and override_function_with_return().

Simply tested according to Documentation/fault-injection/fault-injection.rst.

Signed-off-by: Kefeng Wang &lt;wangkefeng.wang@huawei.com&gt;
Signed-off-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
This enables HAVE_FUNCTION_ERROR_INJECTION by adding necessary
regs_set_return_value() and override_function_with_return().

Simply tested according to Documentation/fault-injection/fault-injection.rst.

Signed-off-by: Kefeng Wang &lt;wangkefeng.wang@huawei.com&gt;
Signed-off-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: 9263/1: use .arch directives instead of assembler command line flags</title>
<updated>2022-11-08T18:36:17+00:00</updated>
<author>
<name>Nick Desaulniers</name>
<email>ndesaulniers@google.com</email>
</author>
<published>2022-10-24T19:44:41+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=a2faac39866d0313f3ca59c36a9f4e077faf4f53'/>
<id>a2faac39866d0313f3ca59c36a9f4e077faf4f53</id>
<content type='text'>
Similar to commit a6c30873ee4a ("ARM: 8989/1: use .fpu assembler
directives instead of assembler arguments").

GCC and GNU binutils support setting the "sub arch" via -march=,
-Wa,-march, target function attribute, and .arch assembler directive.

Clang was missing support for -Wa,-march=, but this was implemented in
clang-13.

The behavior of both GCC and Clang is to
prefer -Wa,-march= over -march= for assembler and assembler-with-cpp
sources, but Clang will warn about the -march= being unused.

clang: warning: argument unused during compilation: '-march=armv6k'
[-Wunused-command-line-argument]

Since most assembler is non-conditionally assembled with one sub arch
(modulo arch/arm/delay-loop.S which conditionally is assembled as armv4
based on CONFIG_ARCH_RPC, and arch/arm/mach-at91/pm-suspend.S which is
conditionally assembled as armv7-a based on CONFIG_CPU_V7), prefer the
.arch assembler directive.

Add a few more instances found in compile testing as found by Arnd and
Nathan.

Link: https://github.com/llvm/llvm-project/commit/1d51c699b9e2ebc5bcfdbe85c74cc871426333d4
Link: https://bugs.llvm.org/show_bug.cgi?id=48894
Link: https://github.com/ClangBuiltLinux/linux/issues/1195
Link: https://github.com/ClangBuiltLinux/linux/issues/1315

Suggested-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
Suggested-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Signed-off-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
Tested-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Signed-off-by: Nick Desaulniers &lt;ndesaulniers@google.com&gt;
Signed-off-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Similar to commit a6c30873ee4a ("ARM: 8989/1: use .fpu assembler
directives instead of assembler arguments").

GCC and GNU binutils support setting the "sub arch" via -march=,
-Wa,-march, target function attribute, and .arch assembler directive.

Clang was missing support for -Wa,-march=, but this was implemented in
clang-13.

The behavior of both GCC and Clang is to
prefer -Wa,-march= over -march= for assembler and assembler-with-cpp
sources, but Clang will warn about the -march= being unused.

clang: warning: argument unused during compilation: '-march=armv6k'
[-Wunused-command-line-argument]

Since most assembler is non-conditionally assembled with one sub arch
(modulo arch/arm/delay-loop.S which conditionally is assembled as armv4
based on CONFIG_ARCH_RPC, and arch/arm/mach-at91/pm-suspend.S which is
conditionally assembled as armv7-a based on CONFIG_CPU_V7), prefer the
.arch assembler directive.

Add a few more instances found in compile testing as found by Arnd and
Nathan.

Link: https://github.com/llvm/llvm-project/commit/1d51c699b9e2ebc5bcfdbe85c74cc871426333d4
Link: https://bugs.llvm.org/show_bug.cgi?id=48894
Link: https://github.com/ClangBuiltLinux/linux/issues/1195
Link: https://github.com/ClangBuiltLinux/linux/issues/1315

Suggested-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
Suggested-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Signed-off-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
Tested-by: Nathan Chancellor &lt;nathan@kernel.org&gt;
Signed-off-by: Nick Desaulniers &lt;ndesaulniers@google.com&gt;
Signed-off-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: 8900/1: UNWINDER_FRAME_POINTER implementation for Clang</title>
<updated>2019-08-29T06:58:01+00:00</updated>
<author>
<name>Nathan Huckleberry</name>
<email>nhuck15@gmail.com</email>
</author>
<published>2019-08-22T20:26:53+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=6dc5fd93b2f1ef75d5e50fced8cb193811f25f22'/>
<id>6dc5fd93b2f1ef75d5e50fced8cb193811f25f22</id>
<content type='text'>
The stackframe setup when compiled with clang is different.
Since the stack unwinder expects the gcc stackframe setup it
fails to print backtraces. This patch adds support for the
clang stackframe setup.

Link: https://github.com/ClangBuiltLinux/linux/issues/35

Cc: clang-built-linux@googlegroups.com
Suggested-by: Tri Vo &lt;trong@google.com&gt;
Signed-off-by: Nathan Huckleberry &lt;nhuck@google.com&gt;
Tested-by: Nick Desaulniers &lt;ndesaulniers@google.com&gt;
Reviewed-by: Nick Desaulniers &lt;ndesaulniers@google.com&gt;
Signed-off-by: Russell King &lt;rmk+kernel@armlinux.org.uk&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The stackframe setup when compiled with clang is different.
Since the stack unwinder expects the gcc stackframe setup it
fails to print backtraces. This patch adds support for the
clang stackframe setup.

Link: https://github.com/ClangBuiltLinux/linux/issues/35

Cc: clang-built-linux@googlegroups.com
Suggested-by: Tri Vo &lt;trong@google.com&gt;
Signed-off-by: Nathan Huckleberry &lt;nhuck@google.com&gt;
Tested-by: Nick Desaulniers &lt;ndesaulniers@google.com&gt;
Reviewed-by: Nick Desaulniers &lt;ndesaulniers@google.com&gt;
Signed-off-by: Russell King &lt;rmk+kernel@armlinux.org.uk&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>ARM: riscpc: move RiscPC assembly files from arch/arm/lib to mach-rpc</title>
<updated>2019-06-11T16:42:36+00:00</updated>
<author>
<name>Russell King</name>
<email>rmk+kernel@armlinux.org.uk</email>
</author>
<published>2019-05-21T14:31:42+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=12290cc462c24deee503e84e87dea622b40ea15d'/>
<id>12290cc462c24deee503e84e87dea622b40ea15d</id>
<content type='text'>
Move the assembly files for RiscPC from arch/arm/lib to mach-rpc so
that we contain RiscPC bits in one subdirectory.

Signed-off-by: Russell King &lt;rmk+kernel@armlinux.org.uk&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Move the assembly files for RiscPC from arch/arm/lib to mach-rpc so
that we contain RiscPC bits in one subdirectory.

Signed-off-by: Russell King &lt;rmk+kernel@armlinux.org.uk&gt;
</pre>
</div>
</content>
</entry>
</feed>
