From: Ard Biesheuvel <ardb@kernel.org>
Implement the ksimd scoped guard API so that it can be used by code that
supports both ARM and arm64.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/arm/include/asm/simd.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/include/asm/simd.h b/arch/arm/include/asm/simd.h
index be08a8da046f..8549fa8b7253 100644
--- a/arch/arm/include/asm/simd.h
+++ b/arch/arm/include/asm/simd.h
@@ -2,14 +2,21 @@
#ifndef _ASM_SIMD_H
#define _ASM_SIMD_H
+#include <linux/cleanup.h>
#include <linux/compiler_attributes.h>
#include <linux/preempt.h>
#include <linux/types.h>
+#include <asm/neon.h>
+
static __must_check inline bool may_use_simd(void)
{
return IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && !in_hardirq()
&& !irqs_disabled();
}
+DEFINE_LOCK_GUARD_0(ksimd, kernel_neon_begin(), kernel_neon_end())
+
+#define scoped_ksimd() scoped_guard(ksimd)
+
#endif /* _ASM_SIMD_H */
--
2.51.0.618.g983fd99d29-goog