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SubjectRe: [PATCH 10/16] compile error: MIPS: add definitions for extended context
This patch is causing a build error for me on 4.3-rc7.

CC arch/mips/kernel/signal.o
arch/mips/kernel/signal.c: In function 'sc_to_extcontext':
arch/mips/kernel/signal.c:143:12: error: 'struct ucontext' has no member
named 'uc_extcontext'
return &uc->uc_extcontext;
^
In file included from include/linux/poll.h:11:0,
from include/linux/ring_buffer.h:7,
from include/linux/trace_events.h:5,
from include/trace/syscall.h:6,
from include/linux/syscalls.h:81,
from arch/mips/kernel/signal.c:26:
arch/mips/kernel/signal.c: In function 'save_msa_extcontext':
arch/mips/kernel/signal.c:171:40: error: dereferencing pointer to
incomplete type 'struct msa_extcontext'
err = __put_user(read_msa_csr(), &msa->csr);
^
./arch/mips/include/asm/uaccess.h:441:15: note: in definition of macro
'__put_user_nocheck'
__typeof__(*(ptr)) __pu_val; \
^
arch/mips/kernel/signal.c:171:9: note: in expansion of macro '__put_user'
err = __put_user(read_msa_csr(), &msa->csr);
^
arch/mips/kernel/signal.c:186:20: error: 'MSA_EXTCONTEXT_MAGIC'
undeclared (first use in this function)
err |= __put_user(MSA_EXTCONTEXT_MAGIC, &msa->ext.magic);
^
./arch/mips/include/asm/uaccess.h:444:14: note: in definition of macro
'__put_user_nocheck'
__pu_val = (x); \
^
arch/mips/kernel/signal.c:186:9: note: in expansion of macro '__put_user'
err |= __put_user(MSA_EXTCONTEXT_MAGIC, &msa->ext.magic);
^
arch/mips/kernel/signal.c:186:20: note: each undeclared identifier is
reported only once for each function it appears in
err |= __put_user(MSA_EXTCONTEXT_MAGIC, &msa->ext.magic);
^
./arch/mips/include/asm/uaccess.h:444:14: note: in definition of macro
'__put_user_nocheck'
__pu_val = (x); \
^
arch/mips/kernel/signal.c:186:9: note: in expansion of macro '__put_user'
err |= __put_user(MSA_EXTCONTEXT_MAGIC, &msa->ext.magic);
^
.......


When I include uapi/asm/ucontext.h instead of asm/ucontext.h in signal.c
it compiles again.

Hauke


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