tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core head: bb3aa6d89286e954fc5c670413c762dca3f4cc44 commit: 8c5e90d837fb1b1b0dda3db559b97bdab9c62853 [19/20] sched/headers: Simplify and clean up header usage in the scheduler config: tile-tilegx_defconfig (attached as .config) compiler: tilegx-linux-gcc (GCC) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 8c5e90d837fb1b1b0dda3db559b97bdab9c62853 # save the attached .config to linux build tree make.cross ARCH=tile
All warnings (new ones prefixed by >>):
In file included from kernel/sched/core.c:10:0:
>> arch/tile/include/asm/switch_to.h:36:0: warning: "prepare_arch_switch"
>> redefined
#define prepare_arch_switch(next) _prepare_arch_switch(next)
In file included from kernel/sched/core.c:8:0:
kernel/sched/sched.h:1392:0: note: this is the location of the previous
definition
# define prepare_arch_switch(next) do { } while (0)
In file included from kernel/sched/core.c:10:0:
>> arch/tile/include/asm/switch_to.h:58:0: warning:
>> "finish_arch_post_lock_switch" redefined
#define finish_arch_post_lock_switch() do { \
In file included from kernel/sched/core.c:8:0:
kernel/sched/sched.h:1395:0: note: this is the location of the previous
definition
# define finish_arch_post_lock_switch() do { } while (0)
--
In file included from kernel//sched/core.c:10:0:
>> arch/tile/include/asm/switch_to.h:36:0: warning: "prepare_arch_switch"
>> redefined
#define prepare_arch_switch(next) _prepare_arch_switch(next)
In file included from kernel//sched/core.c:8:0:
kernel//sched/sched.h:1392:0: note: this is the location of the previous
definition
# define prepare_arch_switch(next) do { } while (0)
In file included from kernel//sched/core.c:10:0:
>> arch/tile/include/asm/switch_to.h:58:0: warning:
>> "finish_arch_post_lock_switch" redefined
#define finish_arch_post_lock_switch() do { \
In file included from kernel//sched/core.c:8:0:
kernel//sched/sched.h:1395:0: note: this is the location of the previous
definition
# define finish_arch_post_lock_switch() do { } while (0)
vim +/prepare_arch_switch +36 arch/tile/include/asm/switch_to.h
bd119c69 David Howells 2012-03-28 32
bd119c69 David Howells 2012-03-28 33 /*
bd119c69 David Howells 2012-03-28 34 * Pause the DMA engine and static
network before task switching.
bd119c69 David Howells 2012-03-28 35 */
bd119c69 David Howells 2012-03-28 @36 #define prepare_arch_switch(next)
_prepare_arch_switch(next)
bd119c69 David Howells 2012-03-28 37 void _prepare_arch_switch(struct
task_struct *next);
bd119c69 David Howells 2012-03-28 38
bd119c69 David Howells 2012-03-28 39 struct task_struct;
bd119c69 David Howells 2012-03-28 40 #define switch_to(prev, next, last)
((last) = _switch_to((prev), (next)))
bd119c69 David Howells 2012-03-28 41 extern struct task_struct
*_switch_to(struct task_struct *prev,
bd119c69 David Howells 2012-03-28 42 struct
task_struct *next);
bd119c69 David Howells 2012-03-28 43
bd119c69 David Howells 2012-03-28 44 /* Helper function for _switch_to(). */
bd119c69 David Howells 2012-03-28 45 extern struct task_struct
*__switch_to(struct task_struct *prev,
bd119c69 David Howells 2012-03-28 46 struct
task_struct *next,
bd119c69 David Howells 2012-03-28 47 unsigned
long new_system_save_k_0);
bd119c69 David Howells 2012-03-28 48
bd119c69 David Howells 2012-03-28 49 /* Address that switched-away from tasks
are at. */
bd119c69 David Howells 2012-03-28 50 extern unsigned long
get_switch_to_pc(void);
bd119c69 David Howells 2012-03-28 51
bd119c69 David Howells 2012-03-28 52 /*
bd119c69 David Howells 2012-03-28 53 * Kernel threads can check to see if
they need to migrate their
bd119c69 David Howells 2012-03-28 54 * stack whenever they return from a
context switch; for user
bd119c69 David Howells 2012-03-28 55 * threads, we defer until they are
returning to user-space.
fe363adb Chris Metcalf 2015-07-29 56 * We defer homecache migration until
the runqueue lock is released.
bd119c69 David Howells 2012-03-28 57 */
fe363adb Chris Metcalf 2015-07-29 @58 #define finish_arch_post_lock_switch()
do { \
1eaef888 Chris Metcalf 2015-08-05 59 __insn_mtspr(SPR_SIM_CONTROL,
SIM_CONTROL_OS_SWITCH | \
1eaef888 Chris Metcalf 2015-08-05 60 (current->pid <<
_SIM_CONTROL_OPERATOR_BITS)); \
bd119c69 David Howells 2012-03-28 61 if (current->mm == NULL && !kstack_hash
&& \
fe363adb Chris Metcalf 2015-07-29 62
current_thread_info()->homecache_cpu != raw_smp_processor_id()) \
bd119c69 David Howells 2012-03-28 63 homecache_migrate_kthread();
\
bd119c69 David Howells 2012-03-28 64 } while (0)
bd119c69 David Howells 2012-03-28 65
:::::: The code at line 36 was first introduced by commit
:::::: bd119c69239322caafdb64517a806037d0d0c70a Disintegrate asm/system.h for
Tile
:::::: TO: David Howells <[email protected]>
:::::: CC: David Howells <[email protected]>
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