[PATCH v2 2/4] exit_thread: remove empty bodies
Jiri Slaby
jslaby at suse.cz
Thu Mar 31 18:55:53 AEDT 2016
Define HAVE_EXIT_THREAD for archs which want to do something in
exit_thread. For others, let's define exit_thread as an empty inline.
This is a cleanup before we change the prototype of exit_thread to
accept a task parameter.
Signed-off-by: Jiri Slaby <jslaby at suse.cz>
Cc: Richard Henderson <rth at twiddle.net>
Cc: Ivan Kokshaysky <ink at jurassic.park.msu.ru>
Cc: Matt Turner <mattst88 at gmail.com>
Cc: Vineet Gupta <vgupta at synopsys.com>
Cc: Russell King <linux at arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will.deacon at arm.com>
Cc: Haavard Skinnemoen <hskinnemoen at gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt at samfundet.no>
Cc: Steven Miao <realmz6 at gmail.com>
Cc: Mark Salter <msalter at redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot at ti.com>
Cc: Mikael Starvik <starvik at axis.com>
Cc: Jesper Nilsson <jesper.nilsson at axis.com>
Cc: Yoshinori Sato <ysato at users.sourceforge.jp>
Cc: Richard Kuo <rkuo at codeaurora.org>
Cc: Geert Uytterhoeven <geert at linux-m68k.org>
Cc: James Hogan <james.hogan at imgtec.com>
Cc: Michal Simek <monstr at monstr.eu>
Cc: Ralf Baechle <ralf at linux-mips.org>
Cc: David Howells <dhowells at redhat.com>
Cc: Koichi Yasutake <yasutake.koichi at jp.panasonic.com>
Cc: Ley Foon Tan <lftan at altera.com>
Cc: Jonas Bonn <jonas at southpole.se>
Cc: "James E.J. Bottomley" <jejb at parisc-linux.org>
Cc: Helge Deller <deller at gmx.de>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: Martin Schwidefsky <schwidefsky at de.ibm.com>
Cc: Heiko Carstens <heiko.carstens at de.ibm.com>
Cc: Chen Liqin <liqin.linux at gmail.com>
Cc: Lennox Wu <lennox.wu at gmail.com>
Cc: Rich Felker <dalias at libc.org>
Cc: "David S. Miller" <davem at davemloft.net>
Cc: Chris Metcalf <cmetcalf at mellanox.com>
Cc: Jeff Dike <jdike at addtoit.com>
Cc: Richard Weinberger <richard at nod.at>
Cc: Guan Xuetao <gxt at mprc.pku.edu.cn>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: Ingo Molnar <mingo at redhat.com>
Cc: "H. Peter Anvin" <hpa at zytor.com>
Cc: x86 at kernel.org
Cc: Tony Luck <tony.luck at intel.com>
Cc: Fenghua Yu <fenghua.yu at intel.com>
Cc: Chris Zankel <chris at zankel.net>
Cc: Max Filippov <jcmvbkbc at gmail.com>
Cc: Peter Zijlstra <peterz at infradead.org>
Cc: linux-kernel at vger.kernel.org
Cc: linux-alpha at vger.kernel.org
Cc: linux-snps-arc at lists.infradead.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: adi-buildroot-devel at lists.sourceforge.net
Cc: linux-c6x-dev at linux-c6x.org
Cc: linux-cris-kernel at axis.com
Cc: linux-ia64 at vger.kernel.org
Cc: uclinux-h8-devel at lists.sourceforge.jp
Cc: linux-hexagon at vger.kernel.org
Cc: linux-m68k at lists.linux-m68k.org
Cc: linux-metag at vger.kernel.org
Cc: linux-mips at linux-mips.org
Cc: linux-am33-list at redhat.com
Cc: nios2-dev at lists.rocketboards.org
Cc: linux-parisc at vger.kernel.org
Cc: linuxppc-dev at lists.ozlabs.org
Cc: linux-s390 at vger.kernel.org
Cc: linux-sh at vger.kernel.org
Cc: sparclinux at vger.kernel.org
Cc: user-mode-linux-devel at lists.sourceforge.net
Cc: user-mode-linux-user at lists.sourceforge.net
Cc: linux-xtensa at linux-xtensa.org
---
arch/Kconfig | 5 +++++
arch/alpha/kernel/process.c | 8 --------
arch/arc/kernel/process.c | 7 -------
arch/arm/Kconfig | 1 +
arch/arm64/kernel/process.c | 7 -------
arch/avr32/Kconfig | 1 +
arch/blackfin/include/asm/processor.h | 7 -------
arch/c6x/kernel/process.c | 4 ----
arch/cris/Kconfig | 1 +
arch/cris/arch-v10/kernel/process.c | 9 ---------
arch/frv/include/asm/processor.h | 7 -------
arch/h8300/include/asm/processor.h | 7 -------
arch/hexagon/kernel/process.c | 7 -------
arch/ia64/Kconfig | 1 +
arch/m32r/kernel/process.c | 9 ---------
arch/m68k/include/asm/processor.h | 7 -------
arch/metag/Kconfig | 1 +
arch/metag/include/asm/processor.h | 2 --
arch/microblaze/include/asm/processor.h | 10 ----------
arch/mips/include/asm/processor.h | 4 ----
arch/mn10300/Kconfig | 1 +
arch/nios2/include/asm/processor.h | 5 -----
arch/openrisc/include/asm/processor.h | 9 ---------
arch/parisc/kernel/process.c | 7 -------
arch/powerpc/kernel/process.c | 4 ----
arch/s390/Kconfig | 1 +
arch/score/kernel/process.c | 2 --
arch/sh/Kconfig | 1 +
arch/sh/kernel/process_32.c | 7 -------
arch/sparc/Kconfig | 1 +
arch/tile/Kconfig | 1 +
arch/um/kernel/process.c | 4 ----
arch/unicore32/kernel/process.c | 7 -------
arch/x86/Kconfig | 1 +
arch/xtensa/Kconfig | 1 +
include/linux/sched.h | 7 +++++++
36 files changed, 24 insertions(+), 140 deletions(-)
diff --git a/arch/Kconfig b/arch/Kconfig
index 81869a5e7e17..0f298f9123dc 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -517,6 +517,11 @@ config HAVE_ARCH_MMAP_RND_BITS
- ARCH_MMAP_RND_BITS_MIN
- ARCH_MMAP_RND_BITS_MAX
+config HAVE_EXIT_THREAD
+ bool
+ help
+ An architecture implements exit_thread.
+
config ARCH_MMAP_RND_BITS_MIN
int
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 84d13263ce46..b483156698d5 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -210,14 +210,6 @@ start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
}
EXPORT_SYMBOL(start_thread);
-/*
- * Free current thread data structures etc..
- */
-void
-exit_thread(void)
-{
-}
-
void
flush_thread(void)
{
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index a3f750e76b68..b5db9e7fd649 100644
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -183,13 +183,6 @@ void flush_thread(void)
{
}
-/*
- * Free any architecture-specific thread data structures, etc.
- */
-void exit_thread(void)
-{
-}
-
int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
{
return 0;
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cdfa6c2b7626..0846026c84de 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -50,6 +50,7 @@ config ARM
select HAVE_DMA_CONTIGUOUS if MMU
select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32 && MMU
select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
+ select HAVE_EXIT_THREAD
select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 80624829db61..5655f756e4f2 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -200,13 +200,6 @@ void show_regs(struct pt_regs * regs)
__show_regs(regs);
}
-/*
- * Free current thread data structures etc..
- */
-void exit_thread(void)
-{
-}
-
static void tls_thread_flush(void)
{
asm ("msr tpidr_el0, xzr");
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index b6878eb64884..37d9c02be634 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -4,6 +4,7 @@ config AVR32
# that we usually don't need on AVR32.
select EXPERT
select HAVE_CLK
+ select HAVE_EXIT_THREAD
select HAVE_OPROFILE
select HAVE_KPROBES
select VIRT_TO_BUS
diff --git a/arch/blackfin/include/asm/processor.h b/arch/blackfin/include/asm/processor.h
index 7acd46653df3..0c265aba94ad 100644
--- a/arch/blackfin/include/asm/processor.h
+++ b/arch/blackfin/include/asm/processor.h
@@ -76,13 +76,6 @@ static inline void release_thread(struct task_struct *dead_task)
}
/*
- * Free current thread data structures etc..
- */
-static inline void exit_thread(void)
-{
-}
-
-/*
* Return saved PC of a blocked thread.
*/
#define thread_saved_pc(tsk) (tsk->thread.pc)
diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c
index 3ae9f5a166a0..0ee7686a78f3 100644
--- a/arch/c6x/kernel/process.c
+++ b/arch/c6x/kernel/process.c
@@ -82,10 +82,6 @@ void flush_thread(void)
{
}
-void exit_thread(void)
-{
-}
-
/*
* Do necessary setup to start up a newly executed thread.
*/
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index e086f9e93728..10a5ccb85cd6 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -62,6 +62,7 @@ config CRIS
select OLD_SIGSUSPEND
select OLD_SIGACTION
select ARCH_REQUIRE_GPIOLIB
+ select HAVE_EXIT_THREAD if ETRAX_ARCH_V32
select IRQ_DOMAIN if ETRAX_ARCH_V32
select OF if ETRAX_ARCH_V32
select OF_EARLY_FLATTREE if ETRAX_ARCH_V32
diff --git a/arch/cris/arch-v10/kernel/process.c b/arch/cris/arch-v10/kernel/process.c
index 02b783457be0..96e5afef6b47 100644
--- a/arch/cris/arch-v10/kernel/process.c
+++ b/arch/cris/arch-v10/kernel/process.c
@@ -35,15 +35,6 @@ void default_idle(void)
local_irq_enable();
}
-/*
- * Free current thread data structures etc..
- */
-
-void exit_thread(void)
-{
- /* Nothing needs to be done. */
-}
-
/* if the watchdog is enabled, we can simply disable interrupts and go
* into an eternal loop, and the watchdog will reset the CPU after 0.1s
* if on the other hand the watchdog wasn't enabled, we just enable it and wait
diff --git a/arch/frv/include/asm/processor.h b/arch/frv/include/asm/processor.h
index ae8d423e79d9..73f0a79ad8e6 100644
--- a/arch/frv/include/asm/processor.h
+++ b/arch/frv/include/asm/processor.h
@@ -97,13 +97,6 @@ extern asmlinkage void *restore_user_regs(const struct user_context *target, ...
#define forget_segments() do { } while (0)
/*
- * Free current thread data structures etc..
- */
-static inline void exit_thread(void)
-{
-}
-
-/*
* Return saved PC of a blocked thread.
*/
extern unsigned long thread_saved_pc(struct task_struct *tsk);
diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h
index 54e3fd83c336..111df7397ac7 100644
--- a/arch/h8300/include/asm/processor.h
+++ b/arch/h8300/include/asm/processor.h
@@ -111,13 +111,6 @@ static inline void release_thread(struct task_struct *dead_task)
}
/*
- * Free current thread data structures etc..
- */
-static inline void exit_thread(void)
-{
-}
-
-/*
* Return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *tsk);
diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c
index a9ebd471823a..d9edfd3fc52a 100644
--- a/arch/hexagon/kernel/process.c
+++ b/arch/hexagon/kernel/process.c
@@ -137,13 +137,6 @@ void release_thread(struct task_struct *dead_task)
}
/*
- * Free any architecture-specific thread data structures, etc.
- */
-void exit_thread(void)
-{
-}
-
-/*
* Some archs flush debug and FPU info here
*/
void flush_thread(void)
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index b534ebab36ea..f80758cb7157 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -18,6 +18,7 @@ config IA64
select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
select HAVE_UNSTABLE_SCHED_CLOCK
+ select HAVE_EXIT_THREAD
select HAVE_IDE
select HAVE_OPROFILE
select HAVE_KPROBES
diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c
index e69221d581d5..a88b1f01e91f 100644
--- a/arch/m32r/kernel/process.c
+++ b/arch/m32r/kernel/process.c
@@ -101,15 +101,6 @@ void show_regs(struct pt_regs * regs)
#endif
}
-/*
- * Free current thread data structures etc..
- */
-void exit_thread(void)
-{
- /* Nothing to do. */
- DPRINTK("pid = %d\n", current->pid);
-}
-
void flush_thread(void)
{
DPRINTK("pid = %d\n", current->pid);
diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index 20dda1d4b860..a6ce2ec8d693 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -153,13 +153,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
-/*
- * Free current thread data structures etc..
- */
-static inline void exit_thread(void)
-{
-}
-
extern unsigned long thread_saved_pc(struct task_struct *tsk);
unsigned long get_wchan(struct task_struct *p);
diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index a0fa88da3e31..e47a08d72819 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig
@@ -11,6 +11,7 @@ config METAG
select HAVE_DEBUG_KMEMLEAK
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DYNAMIC_FTRACE
+ select HAVE_EXIT_THREAD
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FUNCTION_TRACER
select HAVE_KERNEL_BZIP2
diff --git a/arch/metag/include/asm/processor.h b/arch/metag/include/asm/processor.h
index 0838ca699764..a0333ebcac35 100644
--- a/arch/metag/include/asm/processor.h
+++ b/arch/metag/include/asm/processor.h
@@ -134,8 +134,6 @@ static inline void release_thread(struct task_struct *dead_task)
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)
-extern void exit_thread(void);
-
/*
* Return saved PC of a blocked thread.
*/
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 497a988d79c2..c38d0dd91134 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -70,11 +70,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
-/* Free all resources held by a thread. */
-static inline void exit_thread(void)
-{
-}
-
extern unsigned long thread_saved_pc(struct task_struct *t);
extern unsigned long get_wchan(struct task_struct *p);
@@ -127,11 +122,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
-/* Free current thread data structures etc. */
-static inline void exit_thread(void)
-{
-}
-
/* Return saved (kernel) PC of a blocked thread. */
# define thread_saved_pc(tsk) \
((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0)
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 06469df2b638..cfa15bad43af 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -359,10 +359,6 @@ static inline void flush_thread(void)
{
}
-static inline void exit_thread(void)
-{
-}
-
unsigned long get_wchan(struct task_struct *p);
#define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + \
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index 06ddb5501ab1..9627e81a6cbb 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -1,5 +1,6 @@
config MN10300
def_bool y
+ select HAVE_EXIT_THREAD
select HAVE_OPROFILE
select HAVE_UID16
select GENERIC_IRQ_SHOW
diff --git a/arch/nios2/include/asm/processor.h b/arch/nios2/include/asm/processor.h
index c2ba45c159c7..1c953f0cadbf 100644
--- a/arch/nios2/include/asm/processor.h
+++ b/arch/nios2/include/asm/processor.h
@@ -75,11 +75,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
-/* Free current thread data structures etc.. */
-static inline void exit_thread(void)
-{
-}
-
/* Return saved PC of a blocked thread. */
#define thread_saved_pc(tsk) ((tsk)->thread.kregs->ea)
diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h
index 4d235e3d2534..70334c9f7d24 100644
--- a/arch/openrisc/include/asm/processor.h
+++ b/arch/openrisc/include/asm/processor.h
@@ -85,15 +85,6 @@ void release_thread(struct task_struct *);
unsigned long get_wchan(struct task_struct *p);
/*
- * Free current thread data structures etc..
- */
-
-extern inline void exit_thread(void)
-{
- /* Nothing needs to be done. */
-}
-
-/*
* Return saved PC of a blocked thread. For now, this is the "user" PC
*/
extern unsigned long thread_saved_pc(struct task_struct *t);
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 809905a811ed..40639439d8b3 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -144,13 +144,6 @@ void machine_power_off(void)
void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_power_off);
-/*
- * Free current thread data structures etc..
- */
-void exit_thread(void)
-{
-}
-
void flush_thread(void)
{
/* Only needs to handle fpu stuff or perf monitors.
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 612df305886b..e323020d91dd 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1326,10 +1326,6 @@ void show_regs(struct pt_regs * regs)
show_instructions(regs);
}
-void exit_thread(void)
-{
-}
-
void flush_thread(void)
{
#ifdef CONFIG_HAVE_HW_BREAKPOINT
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 43b25835325f..37941df616d9 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -130,6 +130,7 @@ config S390
select HAVE_DMA_API_DEBUG
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS
+ select HAVE_EXIT_THREAD
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_TRACER
diff --git a/arch/score/kernel/process.c b/arch/score/kernel/process.c
index a1519ad3d49d..aae9480706c2 100644
--- a/arch/score/kernel/process.c
+++ b/arch/score/kernel/process.c
@@ -56,8 +56,6 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
regs->regs[0] = sp;
}
-void exit_thread(void) {}
-
/*
* When a process does an "exec", machine state like FPU and debug
* registers need to be reset. This is a hook function for that.
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 7ed20fc3fc81..cb93af8f8017 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -71,6 +71,7 @@ config SUPERH32
config SUPERH64
def_bool ARCH = "sh64"
+ select HAVE_EXIT_THREAD
select KALLSYMS
config ARCH_DEFCONFIG
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 2885fc9d9dcd..ee12e9451874 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -76,13 +76,6 @@ void start_thread(struct pt_regs *regs, unsigned long new_pc,
}
EXPORT_SYMBOL(start_thread);
-/*
- * Free current thread data structures etc..
- */
-void exit_thread(void)
-{
-}
-
void flush_thread(void)
{
struct task_struct *tsk = current;
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 57ffaf285c2f..b66aea06e9c9 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -20,6 +20,7 @@ config SPARC
select HAVE_OPROFILE
select HAVE_ARCH_KGDB if !SMP || SPARC64
select HAVE_ARCH_TRACEHOOK
+ select HAVE_EXIT_THREAD
select SYSCTL_EXCEPTION_TRACE
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 81719302b056..174746225577 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -3,6 +3,7 @@
config TILE
def_bool y
+ select HAVE_EXIT_THREAD
select HAVE_PERF_EVENTS
select USE_PMC if PERF_EVENTS
select HAVE_DMA_API_DEBUG
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 48af59aae129..0b04711f1f18 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -103,10 +103,6 @@ void interrupt_end(void)
tracehook_notify_resume(regs);
}
-void exit_thread(void)
-{
-}
-
int get_current_pid(void)
{
return task_pid_nr(current);
diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c
index b008e9961465..00299c927852 100644
--- a/arch/unicore32/kernel/process.c
+++ b/arch/unicore32/kernel/process.c
@@ -201,13 +201,6 @@ void show_regs(struct pt_regs *regs)
__backtrace();
}
-/*
- * Free current thread data structures etc..
- */
-void exit_thread(void)
-{
-}
-
void flush_thread(void)
{
struct thread_info *thread = current_thread_info();
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6bc6f9832d67..8f6196084eac 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -105,6 +105,7 @@ config X86
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_EFFICIENT_UNALIGNED_ACCESS
+ select HAVE_EXIT_THREAD
select HAVE_FENTRY if X86_64
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FUNCTION_GRAPH_FP_TEST
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index e832d3e9835e..c6b2ee78b617 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -15,6 +15,7 @@ config XTENSA
select GENERIC_PCI_IOMAP
select GENERIC_SCHED_CLOCK
select HAVE_DMA_API_DEBUG
+ select HAVE_EXIT_THREAD
select HAVE_FUNCTION_TRACER
select HAVE_FUTEX_CMPXCHG if !MMU
select HAVE_HW_BREAKPOINT if PERF_EVENTS
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 362c0e20ebbb..de5370802828 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2646,7 +2646,14 @@ static inline int copy_thread_tls(
}
#endif
extern void flush_thread(void);
+
+#ifdef CONFIG_HAVE_EXIT_THREAD
extern void exit_thread(void);
+#else
+static inline void exit_thread(void)
+{
+}
+#endif
extern void exit_files(struct task_struct *);
extern void __cleanup_sighand(struct sighand_struct *);
--
2.7.4
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