linux-kernel - [PATCH v2] x86/uapi: fix asm/signal.h userspace compilation error

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Message-ID: <20170302001853.GA27097@altlinux.org>
Date:   Thu, 2 Mar 2017 03:18:54 +0300
From:   "Dmitry V. Levin" <ldv@...linux.org>
To:     Arnd Bergmann <arnd@...db.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] x86/uapi: fix asm/signal.h userspace compilation error

Replace size_t to fix the following asm/signal.h userspace compilation
error:

/usr/include/asm/signal.h:126:2: error: unknown type name 'size_t'
  size_t ss_size;

size_t is replaced with __kernel_size_t in all cases except x32 where
unsigned int has to be used instead.

Signed-off-by: Dmitry V. Levin <ldv@...linux.org>
---
v2: create a separate patch for x86,
    replace size_t instead of including <stddef.h>.

 arch/x86/include/uapi/asm/signal.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/uapi/asm/signal.h b/arch/x86/include/uapi/asm/signal.h
index 8264f47..f80473f 100644
--- a/arch/x86/include/uapi/asm/signal.h
+++ b/arch/x86/include/uapi/asm/signal.h
@@ -127,7 +127,11 @@ struct sigaction {
 typedef struct sigaltstack {
 	void __user *ss_sp;
 	int ss_flags;
-	size_t ss_size;
+#if defined(__x86_64__) && defined(__ILP32__)
+	unsigned int ss_size;
+#else
+	__kernel_size_t ss_size;
+#endif
 } stack_t;
 
 #endif /* __ASSEMBLY__ */
-- 
ldv