Messages in this thread | | | From | Alexander Potapenko <> | Date | Thu, 14 Dec 2023 10:27:12 +0100 | Subject | Re: [PATCH v9 1/4] arm64: mte: implement CONFIG_ARM64_MTE_COMP |
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On Wed, Dec 13, 2023 at 1:16 PM Will Deacon <will@kernel.org> wrote: > > On Tue, Dec 12, 2023 at 05:16:15PM +0000, Catalin Marinas wrote: > > On Mon, Nov 13, 2023 at 11:52:30AM +0100, Alexander Potapenko wrote: > > > The config implements the algorithm compressing memory tags for ARM MTE > > > during swapping. > > > > > > The algorithm is based on RLE and specifically targets buffers of tags > > > corresponding to a single page. In many cases a buffer can be compressed > > > into 63 bits, making it possible to store it without additional memory > > > allocation. > > > > > > Suggested-by: Evgenii Stepanov <eugenis@google.com> > > > Signed-off-by: Alexander Potapenko <glider@google.com> > > > > Acked-by: Catalin Marinas <catalin.marinas@arm.com> > > > > > +void mte_tags_to_ranges(u8 *tags, u8 *out_tags, unsigned short *out_sizes, > > > + size_t *out_len) > > > +{ > > [...] > > > +} > > > +EXPORT_SYMBOL_NS(mte_tags_to_ranges, MTECOMP); > > > > I may have asked before, what the reason for EXPORT_SYMBOL_NS? Is it for > > the kunit tests? Otherwise we don't expect those to be accessed from > > modules. > > It looks like it. The Kconfig option for the test is tristate and it calls > this symbol directly. > > Will
What Will said.
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