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, 18 insertions, 35 deletions

diff --git a/arch/tile/lib/atomic_32.c b/arch/tile/lib/atomic_32.c
index be1e8acd105..8040b42a8ee 100644
--- a/arch/tile/lib/atomic_32.c
+++ b/arch/tile/lib/atomic_32.c
@@ -18,27 +18,10 @@
 #include <linux/module.h>
 #include <linux/mm.h>
 #include <asm/atomic.h>
+#include <asm/futex.h>
 #include <arch/chip.h>
 
-/* The routines in atomic_asm.S are private, so we only declare them here. */
-extern struct __get_user __atomic_cmpxchg(volatile int *p,
-                                          int *lock, int o, int n);
-extern struct __get_user __atomic_xchg(volatile int *p, int *lock, int n);
-extern struct __get_user __atomic_xchg_add(volatile int *p, int *lock, int n);
-extern struct __get_user __atomic_xchg_add_unless(volatile int *p,
-                                                  int *lock, int o, int n);
-extern struct __get_user __atomic_or(volatile int *p, int *lock, int n);
-extern struct __get_user __atomic_andn(volatile int *p, int *lock, int n);
-extern struct __get_user __atomic_xor(volatile int *p, int *lock, int n);
-
-extern u64 __atomic64_cmpxchg(volatile u64 *p, int *lock, u64 o, u64 n);
-extern u64 __atomic64_xchg(volatile u64 *p, int *lock, u64 n);
-extern u64 __atomic64_xchg_add(volatile u64 *p, int *lock, u64 n);
-extern u64 __atomic64_xchg_add_unless(volatile u64 *p,
-                                      int *lock, u64 o, u64 n);
-
-
-/* See <asm/atomic.h> */
+/* See <asm/atomic_32.h> */
 #if ATOMIC_LOCKS_FOUND_VIA_TABLE()
 
 /*
@@ -209,7 +192,7 @@ u64 _atomic64_cmpxchg(atomic64_t *v, u64 o, u64 n)
 EXPORT_SYMBOL(_atomic64_cmpxchg);
 
 
-static inline int *__futex_setup(__user int *v)
+static inline int *__futex_setup(int __user *v)
 {
         /*
          * Issue a prefetch to the counter to bring it into cache.
@@ -217,37 +200,37 @@ static inline int *__futex_setup(__user int *v)
          * since it might fault; instead we do a prefetch into the L2.
          */
         __insn_prefetch(v);
-        return __atomic_hashed_lock(v);
+        return __atomic_hashed_lock((int __force *)v);
 }
 
-struct __get_user futex_set(int *v, int i)
+struct __get_user futex_set(int __user *v, int i)
 {
-        return __atomic_xchg(v, __futex_setup(v), i);
+        return __atomic_xchg((int __force *)v, __futex_setup(v), i);
 }
 
-struct __get_user futex_add(int *v, int n)
+struct __get_user futex_add(int __user *v, int n)
 {
-        return __atomic_xchg_add(v, __futex_setup(v), n);
+        return __atomic_xchg_add((int __force *)v, __futex_setup(v), n);
 }
 
-struct __get_user futex_or(int *v, int n)
+struct __get_user futex_or(int __user *v, int n)
 {
-        return __atomic_or(v, __futex_setup(v), n);
+        return __atomic_or((int __force *)v, __futex_setup(v), n);
 }
 
-struct __get_user futex_andn(int *v, int n)
+struct __get_user futex_andn(int __user *v, int n)
 {
-        return __atomic_andn(v, __futex_setup(v), n);
+        return __atomic_andn((int __force *)v, __futex_setup(v), n);
 }
 
-struct __get_user futex_xor(int *v, int n)
+struct __get_user futex_xor(int __user *v, int n)
 {
-        return __atomic_xor(v, __futex_setup(v), n);
+        return __atomic_xor((int __force *)v, __futex_setup(v), n);
 }
 
-struct __get_user futex_cmpxchg(int *v, int o, int n)
+struct __get_user futex_cmpxchg(int __user *v, int o, int n)
 {
-        return __atomic_cmpxchg(v, __futex_setup(v), o, n);
+        return __atomic_cmpxchg((int __force *)v, __futex_setup(v), o, n);
 }
 
 /*
@@ -260,7 +243,7 @@ struct __get_user futex_cmpxchg(int *v, int o, int n)
  * invoked in is the context of the "_atomic_xxx()" routines called
  * by the functions in this file.
  */
-struct __get_user __atomic_bad_address(int *addr)
+struct __get_user __atomic_bad_address(int __user *addr)
 {
         if (unlikely(!access_ok(VERIFY_WRITE, addr, sizeof(int))))
                 panic("Bad address used for kernel atomic op: %p\n", addr);
@@ -271,7 +254,7 @@ struct __get_user __atomic_bad_address(int *addr)
 #if CHIP_HAS_CBOX_HOME_MAP()
 static int __init noatomichash(char *str)
 {
-        printk("noatomichash is deprecated.\n");
+        pr_warning("noatomichash is deprecated.\n");
         return 1;
 }
 __setup("noatomichash", noatomichash);