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The __lse_*() and __ll_sc_*() atomic implementations are marked as
inline rather than __always_inline, permitting a compiler to generate
out-of-line versions, which may be instrumented.
We marked the atomic wrappers as __always_inline in commit:
c35a824c31 ("arm64: make atomic helpers __always_inline")
... but did not think to do the same for the underlying implementations.
If the compiler were to out-of-line an LSE or LL/SC atomic, this could
break noinstr code. Ensure this doesn't happen by marking the underlying
implementations as __always_inline.
There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220817155914.3975112-3-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.