linux/arch/arm64/include
Dave Martin 66c3ec5a71 arm64: neon: Forbid when irqs are disabled
Currently, may_use_simd() can return true if IRQs are disabled.  If
the caller goes ahead and calls kernel_neon_begin(), this can
result in use of local_bh_enable() in an unsafe context.

In particular, __efi_fpsimd_begin() may do this when calling EFI as
part of system shutdown.

This patch ensures that callers don't think they can use
kernel_neon_begin() in such a context.

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-08-09 15:05:59 +01:00
..
asm arm64: neon: Forbid when irqs are disabled 2017-08-09 15:05:59 +01:00
uapi/asm arm64: move generic-y of exported headers to uapi/asm/Kbuild 2017-07-10 03:43:20 +09:00