Re: [PATCH v3 2/5] arm64: vdso32: Detect binutils support for dmb ishld

[Catalin Marinas]

On Thu, Sep 26, 2019 at 10:43:39PM +0100, Vincenzo Frascino wrote:
> As reported by Will Deacon, older versions of binutils that do not
> support certain types of memory barriers can cause build failure of the
> vdso32 library.
> 
> Add a compilation time mechanism that detects if binutils supports those
> instructions and configure the kernel accordingly.
> 
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>

Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>