linux.git/arch/hexagon/kernel, branch v6.16

arch: use always-$(KBUILD_BUILTIN) for vmlinux.lds

2025-06-07T05:38:07+00:00

The extra-y syntax is deprecated. Instead, use always-$(KBUILD_BUILTIN),
which behaves equivalently.

Signed-off-by: Masahiro Yamada 
Acked-by: Johannes Berg 
Reviewed-by: Nicolas Schier

hexagon: Fix unbalanced spinlock in die()

2025-01-31T02:46:06+00:00

die executes holding the spinlock of &die.lock and unlock
it after printing the oops message.
However in the code if the notify_die() returns NOTIFY_STOP
, die() exit with returning 1 but never unlocked the spinlock.

Fix this by adding spin_unlock_irq(&die.lock) before returning.

Fixes: cf9750bae262 ("Hexagon: Provide basic debugging and system trap support.")
Signed-off-by: Lin Yujun 
Link: https://lore.kernel.org/r/20230522025608.2515558-1-linyujun809@huawei.com
Signed-off-by: Brian Cain 
Signed-off-by: Brian Cain

hexagon: Fix warning comparing pointer to 0

2025-01-31T02:45:52+00:00

./arch/hexagon/kernel/traps.c:138:6-7: WARNING comparing pointer to 0

Avoid pointer type value compared with 0 to make code clear.

Reported-by: Abaci Robot 
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=3978
Signed-off-by: Yang Li 
Link: https://lore.kernel.org/r/20230208011105.80219-1-yang.lee@linux.alibaba.com
Signed-off-by: Brian Cain 
Signed-off-by: Brian Cain

hexagon: time: Remove redundant null check for resource

2025-01-31T02:45:32+00:00

Null check for 'resource' before assignment is unnecessary because the
variable 'resource' is initialized to NULL at the beginning of the function.

Signed-off-by: Hardevsinh Palaniya 
Link: https://lore.kernel.org/r/20241111142458.67854-1-hardevsinh.palaniya@siliconsignals.io
Signed-off-by: Brian Cain 
Signed-off-by: Brian Cain

hexagon: vdso: Fix build failure

2024-09-23T15:17:50+00:00

Hexagon images fail to build with the following error.

arch/hexagon/kernel/vdso.c:57:3: error: use of undeclared identifier 'name'
                name = "[vdso]",
                ^

Add the missing '.' to fix the problem.

Fixes: 497258dfafcc ("mm: remove legacy install_special_mapping() code")
Cc: Linus Torvalds 
Signed-off-by: Guenter Roeck 
Reviewed-by: Brian Cain 
Signed-off-by: Linus Torvalds

mm: remove legacy install_special_mapping() code

2024-09-02T03:26:13+00:00

All relevant architectures had already been converted to the new interface
(which just has an underscore in front of the name - not very imaginative
naming), this just force-converts the stragglers.

The modern interface is almost identical to the old one, except instead of
the page pointer it takes a "struct vm_special_mapping" that describes the
mapping (and contains the page pointer as one member), and it returns the
resulting 'vma' instead of just the error code.

Getting rid of the old interface also gets rid of some special casing,
which had caused problems with the mremap extensions to "struct
vm_special_mapping".

[akpm@linux-foundation.org: coding-style cleanups]
Link: https://lkml.kernel.org/r/CAHk-=whvR+z=0=0gzgdfUiK70JTa-=+9vxD-4T=3BagXR6dciA@mail.gmail.comTested-by: Rob Landley  # arch/sh/
Link: https://lore.kernel.org/all/20240819195120.GA1113263@thelio-3990X/
Signed-off-by: Linus Torvalds 
Cc: Nathan Chancellor 
Cc: Michael Ellerman 
Cc: Anton Ivanov 
Cc: Brian Cain 
Cc: Christophe Leroy 
Cc: Dinh Nguyen 
Cc: Guo Ren 
Cc: Jeff Xu 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Liam R. Howlett 
Cc: Nicholas Piggin 
Cc: Pedro Falcato 
Cc: Richard Weinberger 
Cc: Rich Felker 
Cc: Rob Landley 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton

hexagon: use new system call table

2024-07-10T12:23:38+00:00

The uapi/asm/unistd_32.h and asm/syscall_table_32.h headers can now be
generated from scripts/syscall.tbl, which makes this consistent with
the other architectures that have their own syscall.tbl.

The time32, stat64, rlimit and renameat entries in the syscall_abis_32
line are for system calls that were part of the generic ABI when
arch/hexagon got added but are no longer enabled by default for new
architectures.

As a side-effect, calling an unimplemented syscall now return -ENOSYS
rather than branching into a NULL pointer.

Signed-off-by: Arnd Bergmann

hexagon: fix fadvise64_64 calling conventions

2024-06-25T13:57:37+00:00

fadvise64_64() has two 64-bit arguments at the wrong alignment
for hexagon, which turns them into a 7-argument syscall that is
not supported by Linux.

The downstream musl port for hexagon actually asks for a 6-argument
version the same way we do it on arm, csky, powerpc, so make the
kernel do it the same way to avoid having to change both.

Link: https://github.com/quic/musl/blob/hexagon/arch/hexagon/syscall_arch.h#L78
Cc: stable@vger.kernel.org
Signed-off-by: Arnd Bergmann

hexagon: vmlinux.lds.S: handle attributes section

2024-03-26T18:07:23+00:00

After the linked LLVM change, the build fails with
CONFIG_LD_ORPHAN_WARN_LEVEL="error", which happens with allmodconfig:

  ld.lld: error: vmlinux.a(init/main.o):(.hexagon.attributes) is being placed in '.hexagon.attributes'

Handle the attributes section in a similar manner as arm and riscv by
adding it after the primary ELF_DETAILS grouping in vmlinux.lds.S, which
fixes the error.

Link: https://lkml.kernel.org/r/20240319-hexagon-handle-attributes-section-vmlinux-lds-s-v1-1-59855dab8872@kernel.org
Fixes: 113616ec5b64 ("hexagon: select ARCH_WANT_LD_ORPHAN_WARN")
Link: https://github.com/llvm/llvm-project/commit/31f4b329c8234fab9afa59494d7f8bdaeaefeaad
Signed-off-by: Nathan Chancellor 
Reviewed-by: Brian Cain 
Cc: Bill Wendling 
Cc: Justin Stitt 
Cc: Nick Desaulniers 
Cc: 
Signed-off-by: Andrew Morton

smp: Consolidate smp_prepare_boot_cpu()

2024-03-04T11:01:54+00:00

There is no point in having seven architectures implementing the same empty
stub.

Provide a weak function in the init code and remove the stubs.

This also allows to utilize the function on UP which is required to
sanitize the per CPU handling on X86 UP.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar 
Link: https://lore.kernel.org/r/20240304005104.567671691@linutronix.de