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Andy Lutomirski a6c19dfe39 arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 
The core mm code will provide a default gate area based on
FIXADDR_USER_START and FIXADDR_USER_END if
!defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR).

This default is only useful for ia64.  arm64, ppc, s390, sh, tile, 64-bit
UML, and x86_32 have their own code just to disable it.  arm, 32-bit UML,
and x86_64 have gate areas, but they have their own implementations.

This gets rid of the default and moves the code into ia64.

This should save some code on architectures without a gate area: it's now
possible to inline the gate_area functions in the default case.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: Nathan Lynch <nathan_lynch@mentor.com>
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [in principle]
Acked-by: Richard Weinberger <richard@nod.at> [for um]
Acked-by: Will Deacon <will.deacon@arm.com> [for arm64]
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Nathan Lynch <Nathan_Lynch@mentor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2014-08-08 15:57:27 -07:00
..
asm arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
os-Linux um: prctl: Do not include linux/ptrace.h 2013-09-07 10:57:11 +02:00
shared/sysdep sanitize rt_sigaction() situation a bit 2013-02-03 15:09:18 -05:00
vdso x86, vdso: Clean up 32-bit vs 64-bit vdso params 2014-05-05 13:18:40 -07:00
Kconfig arch/um: make it work with defconfig and x86_64 2013-11-17 11:31:48 +01:00
Makefile x86: switch to generic old sigaction 2013-02-03 18:16:27 -05:00
bug.c
…
bugs_32.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
bugs_64.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
checksum_32.S x86, extable: Remove open-coded exception table entries in arch/x86/um/checksum_32.S 2012-04-20 13:51:39 -07:00
delay.c um: merge delay_{32,64}.c 2011-11-02 14:15:37 +01:00
elfcore.c switch elf_core_write_extra_data() to dump_emit() 2013-11-09 00:16:23 -05:00
fault.c um: don't compare a pointer to 0 2012-12-20 11:49:39 -08:00
ksyms.c
…
ldt.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
mem_32.c coredump: remove VM_ALWAYSDUMP flag 2012-03-23 16:58:42 -07:00
mem_64.c arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
ptrace_32.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
ptrace_64.c um: unify ptrace_user.h 2011-11-02 14:15:27 +01:00
ptrace_user.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
setjmp_32.S
…
setjmp_64.S
…
signal.c um: remove dead code 2013-07-19 11:35:32 +02:00
stub_32.S um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
stub_64.S um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
stub_segv.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
sys_call_table_32.c x86: get rid of pt_regs argument in vm86/vm86old 2013-02-03 18:16:24 -05:00
sys_call_table_64.c introduce generic sys_sigaltstack(), switch x86 and um to it 2012-12-19 18:07:40 -05:00
syscalls_64.c um: kill thread->forking 2012-09-27 18:04:55 +02:00
sysrq_32.c um: Rewrite show_stack() 2013-11-17 11:27:25 +01:00
sysrq_64.c um: Rewrite show_stack() 2013-11-17 11:27:25 +01:00
tls_32.c make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect 2013-03-03 22:58:33 -05:00
tls_64.c um: get rid of pointless include "..." where include <...> will do 2012-10-09 22:28:45 +02:00
user-offsets.c x32: Add x32 system calls to syscall/syscall_64.tbl 2012-02-20 12:48:49 -08:00