Hi Andrew,
After merging the akpm tree, today's linux-next build (x86_64
allmodconfig) failed like this:
In file included from include/linux/compat.h:18:0,
from arch/x86/include/asm/ia32.h:7,
from arch/x86/include/asm/sigframe.h:17,
from arch/x86/kernel/asm-offsets.c:16:
arch/x86/include/asm/compat.h: In function 'arch_compat_alloc_user_space':
arch/x86/include/asm/compat.h:232:3: error: implicit declaration of function 'percpu_read' [-Werror=implicit-function-declaration]
Caused by commit d1a797f388d6 ("x32: Handle process creation") from the
tip tree interacting with commit 30999a95d190 ("percpu: remove percpu_xxx()
functions") from the akpm tree.
I applied the following fix up patch.
From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Mon, 27 Feb 2012 17:12:00 +1100
Subject: [PATCH] percpu: fix for removal of percpu_xxx function
Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/compat.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/include/asm/compat.h b/arch/x86/include/asm/compat.h
index e7f68b4..b6a2a1c 100644
--- a/arch/x86/include/asm/compat.h
+++ b/arch/x86/include/asm/compat.h
@@ -229,7 +229,7 @@ static inline void __user *arch_compat_alloc_user_space(long len)
sp = task_pt_regs(current)->sp;
} else {
/* -128 for the x32 ABI redzone */
- sp = percpu_read(old_rsp) - 128;
+ sp = __this_cpu_read(old_rsp) - 128;
}
return (void __user *)round_down(sp - len, 16);
--
1.7.9.1
--
Cheers,
Stephen Rothwell sfr@xxxxxxxxxxxxxxxx
Attachment:
pgpyhu4MWWr0s.pgp
Description: PGP signature
