On Tue, Nov 30, 2021 at 11:08PM +0100, andrey.konovalov@xxxxxxxxx wrote: > From: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > > vmalloc tagging support for HW_TAGS KASAN is now complete. > > Allow enabling CONFIG_KASAN_VMALLOC. This actually doesn't "allow" enabling it, it unconditionally enables it and a user can't disable CONFIG_KASAN_VMALLOC. I found some background in acc3042d62cb9 why arm64 wants this. > Also adjust CONFIG_KASAN_VMALLOC description: > > - Mention HW_TAGS support. > - Remove unneeded internal details: they have no place in Kconfig > description and are already explained in the documentation. > > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > --- > arch/arm64/Kconfig | 3 +-- > lib/Kconfig.kasan | 20 ++++++++++---------- > 2 files changed, 11 insertions(+), 12 deletions(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index c05d7a06276f..5981e5460c51 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -205,8 +205,7 @@ config ARM64 > select IOMMU_DMA if IOMMU_SUPPORT > select IRQ_DOMAIN > select IRQ_FORCED_THREADING > - select KASAN_VMALLOC if KASAN_GENERIC > - select KASAN_VMALLOC if KASAN_SW_TAGS > + select KASAN_VMALLOC This produces the following warning when making an arm64 defconfig: | WARNING: unmet direct dependencies detected for KASAN_VMALLOC | Depends on [n]: KASAN [=n] && HAVE_ARCH_KASAN_VMALLOC [=y] | Selected by [y]: | - ARM64 [=y] | | WARNING: unmet direct dependencies detected for KASAN_VMALLOC | Depends on [n]: KASAN [=n] && HAVE_ARCH_KASAN_VMALLOC [=y] | Selected by [y]: | - ARM64 [=y] To unconditionally select KASAN_VMALLOC, it should probably be select KASAN_VMALLOC if KASAN
