[PATCH v2 1/2] arm64: add workaround for ambiguous C99 stdint.h types

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



In a way similar to ARM commit 09096f6a0ee2 ("ARM: 7822/1: add workaround
for ambiguous C99 stdint.h types"), this patch redefines the macros that
are used in stdint.h so its definitions of uint64_t and int64_t are
compatible with those of the kernel.

This patch comes from: https://patchwork.kernel.org/patch/3540001/
Wrote by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>

Signed-off-by: Jackie Liu <liuyun01@xxxxxxxxxx>
---
 arch/arm64/include/uapi/asm/types.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 arch/arm64/include/uapi/asm/types.h

diff --git a/arch/arm64/include/uapi/asm/types.h b/arch/arm64/include/uapi/asm/types.h
new file mode 100644
index 0000000..0016780
--- /dev/null
+++ b/arch/arm64/include/uapi/asm/types.h
@@ -0,0 +1,26 @@
+#ifndef _UAPI_ASM_TYPES_H
+#define _UAPI_ASM_TYPES_H
+
+#include <asm-generic/int-ll64.h>
+
+/*
+ * For Aarch64, there is some ambiguity in the definition of the types below
+ * between the kernel and GCC itself. This is usually not a big deal, but it
+ * causes trouble when including GCC's version of 'stdint.h' (this is the file
+ * that gets included when you #include <stdint.h> on a -ffreestanding build).
+ * As this file also gets included implicitly when including 'arm_neon.h' (the
+ * NEON intrinsics support header), we need the following to work around the
+ * issue if we want to use NEON intrinsics in the kernel.
+ */
+
+#ifdef __INT64_TYPE__
+#undef __INT64_TYPE__
+#define __INT64_TYPE__		__signed__ long long
+#endif
+
+#ifdef __UINT64_TYPE__
+#undef __UINT64_TYPE__
+#define __UINT64_TYPE__		unsigned long long
+#endif
+
+#endif /* _UAPI_ASM_TYPES_H */
-- 
2.7.4







[Index of Archives]     [Linux RAID]     [Linux SCSI]     [Linux ATA RAID]     [IDE]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Device Mapper]

  Powered by Linux