linux-kernel - [PATCH RESEND 1/2] uapi/asm-generic: Allow defining a custom _

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Message-Id: <20190703005202.7578-2-alistair.francis@wdc.com>
Date:   Tue,  2 Jul 2019 17:52:01 -0700
From:   Alistair Francis <alistair.francis@....com>
To:     linux-riscv@...ts.infradead.org, arnd@...db.de
Cc:     linux-kernel@...r.kernel.org, alistair23@...il.com,
        Alistair Francis <alistair.francis@....com>
Subject: [PATCH RESEND 1/2] uapi/asm-generic: Allow defining a custom __SIGINFO struct

Allow defining a custom __SIGINFO struct. This allows architectures to
apply their own padding and allignment requirements to the struct. This
is similar to the __ARCH_SI_ATTRIBUTES #define that already exists, but
applies to the __SIGINFO struct instead of the siginfo_t struct.

Signed-off-by: Alistair Francis <alistair.francis@....com>
---
 include/uapi/asm-generic/siginfo.h | 32 ++++++++++++++++--------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index cb3d6c267181..09b0a1abac14 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -108,23 +108,25 @@ union __sifields {
 	} _sigsys;
 };
 
-#ifndef __ARCH_HAS_SWAPPED_SIGINFO
-#define __SIGINFO 			\
-struct {				\
-	int si_signo;			\
-	int si_errno;			\
-	int si_code;			\
-	union __sifields _sifields;	\
+#ifndef __SIGINFO
+# ifndef __ARCH_HAS_SWAPPED_SIGINFO
+# define __SIGINFO 						\
+struct {							\
+	int si_signo;						\
+	int si_errno;						\
+	int si_code;						\
+	union __sifields _sifields __ARCH_SI_ATTRIBUTES;	\
 }
-#else
-#define __SIGINFO 			\
-struct {				\
-	int si_signo;			\
-	int si_code;			\
-	int si_errno;			\
-	union __sifields _sifields;	\
+# else
+# define __SIGINFO 						\
+struct {							\
+	int si_signo;						\
+	int si_code;						\
+	int si_errno;						\
+	union __sifields _sifields __ARCH_SI_ATTRIBUTES;	\
 }
-#endif /* __ARCH_HAS_SWAPPED_SIGINFO */
+# endif /* __ARCH_HAS_SWAPPED_SIGINFO */
+#endif /* __SIGINFO */
 
 typedef struct siginfo {
 	union {
-- 
2.22.0