percpu: remove some sparse warnings

Make the following changes to remove some sparse warnings.

* Make DEFINE_PER_CPU_SECTION() declare __pcpu_unique_* before
  defining it.

* Annotate pcpu_extend_area_map() that it is entered with pcpu_lock
  held, releases it and then reacquires it.

* Make percpu related macros use unique nested variable names.

* While at it, add pcpu prefix to __size_call[_return]() macros as
  to-be-implemented sparse annotations will add percpu specific stuff
  to these macros.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 13 insertions, 13 deletions

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 8b5ec19bdef4..0c44196b78ac 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -74,31 +74,31 @@ extern void __bad_percpu_size(void);
 
 #define percpu_to_op(op, var, val)                      \
 do {                                                    \
-        typedef typeof(var) T__;                        \
+        typedef typeof(var) pto_T__;                    \
         if (0) {                                        \
-                T__ tmp__;                              \
-                tmp__ = (val);                          \
+                pto_T__ pto_tmp__;                      \
+                pto_tmp__ = (val);                      \
         }                                               \
         switch (sizeof(var)) {                          \
         case 1:                                         \
                 asm(op "b %1,"__percpu_arg(0)           \
                     : "+m" (var)                        \
-                    : "qi" ((T__)(val)));               \
+                    : "qi" ((pto_T__)(val)));           \
                 break;                                  \
         case 2:                                         \
                 asm(op "w %1,"__percpu_arg(0)           \
                     : "+m" (var)                        \
-                    : "ri" ((T__)(val)));               \
+                    : "ri" ((pto_T__)(val)));           \
                 break;                                  \
         case 4:                                         \
                 asm(op "l %1,"__percpu_arg(0)           \
                     : "+m" (var)                        \
-                    : "ri" ((T__)(val)));               \
+                    : "ri" ((pto_T__)(val)));           \
                 break;                                  \
         case 8:                                         \
                 asm(op "q %1,"__percpu_arg(0)           \
                     : "+m" (var)                        \
-                    : "re" ((T__)(val)));               \
+                    : "re" ((pto_T__)(val)));           \
                 break;                                  \
         default: __bad_percpu_size();                   \
         }                                               \
@@ -106,31 +106,31 @@ do {							\
 
 #define percpu_from_op(op, var, constraint)             \
 ({                                                      \
-        typeof(var) ret__;                              \
+        typeof(var) pfo_ret__;                          \
         switch (sizeof(var)) {                          \
         case 1:                                         \
                 asm(op "b "__percpu_arg(1)",%0"         \
-                    : "=q" (ret__)                      \
+                    : "=q" (pfo_ret__)                  \
                     : constraint);                      \
                 break;                                  \
         case 2:                                         \
                 asm(op "w "__percpu_arg(1)",%0"         \
-                    : "=r" (ret__)                      \
+                    : "=r" (pfo_ret__)                  \
                     : constraint);                      \
                 break;                                  \
         case 4:                                         \
                 asm(op "l "__percpu_arg(1)",%0"         \
-                    : "=r" (ret__)                      \
+                    : "=r" (pfo_ret__)                  \
                     : constraint);                      \
                 break;                                  \
         case 8:                                         \
                 asm(op "q "__percpu_arg(1)",%0"         \
-                    : "=r" (ret__)                      \
+                    : "=r" (pfo_ret__)                  \
                     : constraint);                      \
                 break;                                  \
         default: __bad_percpu_size();                   \
         }                                               \
-        ret__;                                          \
+        pfo_ret__;                                      \
 })
 
 /*