| Message ID | 20190429172713.11965-1-vincenzo.frascino@arm.com (mailing list archive) |
|---|---|
| State | Mainlined, archived |
| Commit | 359db57c34af15edf35492944af4d4417f59886c |
| Headers | show |
| Series | arm64: compat: Reduce address limit for 64K pages | expand |
On Mon, Apr 29, 2019 at 06:27:13PM +0100, Vincenzo Frascino wrote: > With the introduction of the config option that allows to enable kuser > helpers, it is now possible to reduce TASK_SIZE_32 when these are > disabled and 64K pages are enabled. This extends the compliance with > the section 6.5.8 of the C standard (C99). > > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will.deacon@arm.com> > Reported-by: Catalin Marinas <catalin.marinas@arm.com> > Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 228af56ece48..fcd0e691b1ea 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -57,7 +57,7 @@ #define TASK_SIZE_64 (UL(1) << vabits_user) #ifdef CONFIG_COMPAT -#ifdef CONFIG_ARM64_64K_PAGES +#if defined(CONFIG_ARM64_64K_PAGES) && defined(CONFIG_KUSER_HELPERS) /* * With CONFIG_ARM64_64K_PAGES enabled, the last page is occupied * by the compat vectors page.
With the introduction of the config option that allows to enable kuser helpers, it is now possible to reduce TASK_SIZE_32 when these are disabled and 64K pages are enabled. This extends the compliance with the section 6.5.8 of the C standard (C99). Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Reported-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- Depends on: - arm64: compat: Reduce address limit - arm64: compat: Add kuser helpers config option arch/arm64/include/asm/processor.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)