arch/tile: Miscellaneous cleanup changes.

This commit is primarily changes caused by reviewing "sparse"
and "checkpatch" output on our sources, so is somewhat noisy, since
things like "printk() -> pr_err()" (or whatever) throughout the
codebase tend to get tedious to read.  Rather than trying to tease
apart precisely which things changed due to which type of code
review, this commit includes various cleanups in the code:

- sparse: Add declarations in headers for globals.
- sparse: Fix __user annotations.
- sparse: Using gfp_t consistently instead of int.
- sparse: removing functions not actually used.
- checkpatch: Clean up printk() warnings by using pr_info(), etc.;
  also avoid partial-line printks except in bootup code.
  - checkpatch: Use exposed structs rather than typedefs.
  - checkpatch: Change some C99 comments to C89 comments.

In addition, a couple of minor other changes are rolled in
to this commit:

- Add support for a "raise" instruction to cause SIGFPE, etc., to be raised.
- Remove some compat code that is unnecessary when we fully eliminate
  some of the deprecated syscalls from the generic syscall ABI.
- Update the tile_defconfig to reflect current config contents.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 30 insertions, 0 deletions

diff --git a/arch/tile/include/asm/system.h b/arch/tile/include/asm/system.h
index d6ca7f816c87..0935094f370a 100644
--- a/arch/tile/include/asm/system.h
+++ b/arch/tile/include/asm/system.h
@@ -160,6 +160,14 @@ struct task_struct;
 extern struct task_struct *_switch_to(struct task_struct *prev,
 				      struct task_struct *next);
 
+/* Helper function for _switch_to(). */
+extern struct task_struct *__switch_to(struct task_struct *prev,
+				       struct task_struct *next,
+				       unsigned long new_system_save_1_0);
+
+/* Address that switched-away from tasks are at. */
+extern unsigned long get_switch_to_pc(void);
+
 /*
  * On SMP systems, when the scheduler does migration-cost autodetection,
  * it needs a way to flush as much of the CPU's caches as possible:
@@ -187,10 +195,26 @@ extern int unaligned_printk;
 /* Number of unaligned fixups performed */
 extern unsigned int unaligned_fixup_count;
 
+/* Init-time routine to do tile-specific per-cpu setup. */
+void setup_cpu(int boot);
+
 /* User-level DMA management functions */
 void grant_dma_mpls(void);
 void restrict_dma_mpls(void);
 
+#ifdef CONFIG_HARDWALL
+/* User-level network management functions */
+void reset_network_state(void);
+void grant_network_mpls(void);
+void restrict_network_mpls(void);
+int hardwall_deactivate(struct task_struct *task);
+
+/* Hook hardwall code into changes in affinity. */
+#define arch_set_cpus_allowed(p, new_mask) do { \
+	if (p->thread.hardwall && !cpumask_equal(&p->cpus_allowed, new_mask)) \
+		hardwall_deactivate(p); \
+} while (0)
+#endif
 
 /* Invoke the simulator "syscall" mechanism (see arch/tile/kernel/entry.S). */
 extern int _sim_syscall(int syscall_num, ...);
@@ -215,6 +239,12 @@ extern int _sim_syscall(int syscall_num, ...);
 		homecache_migrate_kthread();                              \
 } while (0)
 
+/* Support function for forking a new task. */
+void ret_from_fork(void);
+
+/* Called from ret_from_fork() when a new process starts up. */
+struct task_struct *sim_notify_fork(struct task_struct *prev);
+
 #endif /* !__ASSEMBLY__ */
 
 #endif /* _ASM_TILE_SYSTEM_H */