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MIPS: ftrace: Tweak safe_load()/safe_store() macros 

Due to name collision in ftrace safe_load and safe_store macros,
these macros cannot take expressions as operands.

For example, compiler will complain for a macro call like the following:
  safe_store_code(new_code2, ip + 4, faulted);

  arch/mips/include/asm/ftrace.h:61:6: note: in definition of macro 'safe_store'
     : [dst] "r" (dst), [src] "r" (src)\
        ^
  arch/mips/kernel/ftrace.c:118:2: note: in expansion of macro 'safe_store_code'
    safe_store_code(new_code2, ip + 4, faulted);
    ^
  arch/mips/kernel/ftrace.c:118:32: error: undefined named operand 'ip + 4'
    safe_store_code(new_code2, ip + 4, faulted);
                                  ^
  arch/mips/include/asm/ftrace.h:61:6: note: in definition of macro 'safe_store'
     : [dst] "r" (dst), [src] "r" (src)\
        ^
  arch/mips/kernel/ftrace.c:118:2: note: in expansion of macro 'safe_store_code'
    safe_store_code(new_code2, ip + 4, faulted);
    ^

This build error is triggered by a4671094 [MIPS: ftrace: Fix icache flush
range error].  Tweak variable naming in those macros to allow flexible
operands.

Signed-off-by: Viller Hsiao <villerhsiao@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: rostedt@goodmis.org
Cc: fweisbec@gmail.com
Cc: mingo@redhat.com
Cc: Qais.Yousef@imgtec.com
Patchwork: https://patchwork.linux-mips.org/patch/6622/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Viller Hsiao 2014-03-18 15:39:34 +08:00 committed by Ralf Baechle
parent 4fe2169ace
commit b08ac66b40
1 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
arch/mips/include/asm/ftrace.h
View File

@ -22,12 +22,12 @@ extern void _mcount(void);
#define safe_load(load, src, dst, error) \
do { \
asm volatile ( \
"1: " load " %[" STR(dst) "], 0(%[" STR(src) "])\n"\
" li %[" STR(error) "], 0\n" \
"1: " load " %[tmp_dst], 0(%[tmp_src])\n" \
" li %[tmp_err], 0\n" \
"2:\n" \
\
".section .fixup, \"ax\"\n" \
"3: li %[" STR(error) "], 1\n" \
"3: li %[tmp_err], 1\n" \
" j 2b\n" \
".previous\n" \
\
@ -35,8 +35,8 @@ do { \
STR(PTR) "\t1b, 3b\n\t" \
".previous\n" \
\
: [dst] "=&r" (dst), [error] "=r" (error)\
: [src] "r" (src) \
: [tmp_dst] "=&r" (dst), [tmp_err] "=r" (error)\
: [tmp_src] "r" (src) \
: "memory" \
); \
} while (0)
@ -44,12 +44,12 @@ do { \
#define safe_store(store, src, dst, error) \
do { \
asm volatile ( \
"1: " store " %[" STR(src) "], 0(%[" STR(dst) "])\n"\
" li %[" STR(error) "], 0\n" \
"1: " store " %[tmp_src], 0(%[tmp_dst])\n"\
" li %[tmp_err], 0\n" \
"2:\n" \
\
".section .fixup, \"ax\"\n" \
"3: li %[" STR(error) "], 1\n" \
"3: li %[tmp_err], 1\n" \
" j 2b\n" \
".previous\n" \
\
@ -57,8 +57,8 @@ do { \
STR(PTR) "\t1b, 3b\n\t" \
".previous\n" \
\
: [error] "=r" (error) \
: [dst] "r" (dst), [src] "r" (src)\
: [tmp_err] "=r" (error) \
: [tmp_dst] "r" (dst), [tmp_src] "r" (src)\
: "memory" \
); \
} while (0)