On Thu, Apr 27, 2023 at 11:16 AM Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote: > > Hi-- > > > > > Maybe the readability of this modification is not very good. Any > > comments and suggestions are welcome. Thanks. > > Some of the patch description could use some cleaning up, > then I have a question. > > > On 4/26/23 06:02, genjian zhang wrote: > > On Wed, Apr 26, 2023 at 8:51 PM Genjian <zhanggenjian123@xxxxxxxxx> wrote: > >> > >> From: Genjian Zhang <zhanggenjian@xxxxxxxxxx> > >> > >> compiler error (mips-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110): > >> > >> {standard input}: Assembler messages: > >> {standard input}:171: Error: found '(', expected: ')' > >> {standard input}:171: Error: found '(', expected: ')' > >> {standard input}:171: Error: non-constant expression in ".if" statement > >> {standard input}:171: Error: junk at end of line, first unrecognized > >> character is `(' > >> > >> Preprocessor expand ___SYNC () macros.However,'if' will be wrongly > > expands ___SYNC() macros. However, 'if' will be wrongly > > >> replaced by C code when PROFILE_ALL_BRANCHES is enabled and ___SYNC > >> is used in inline assembly.This leads to syntax errors in the code. > > assembly. This > > >> Compilers report a lot of errors like the above. > >> Move '.if' into quoted strings to fix it. > >> > >> Reported-by: k2ci <kernel-bot@xxxxxxxxxx> > >> Signed-off-by: Genjian Zhang <zhanggenjian@xxxxxxxxxx> > >> --- > >> arch/mips/include/asm/sync.h | 8 +++++--- > >> 1 file changed, 5 insertions(+), 3 deletions(-) > >> > >> diff --git a/arch/mips/include/asm/sync.h b/arch/mips/include/asm/sync.h > >> index aabd097933fe..d9f5a87424e7 100644 > >> --- a/arch/mips/include/asm/sync.h > >> +++ b/arch/mips/include/asm/sync.h > >> @@ -175,7 +175,7 @@ > >> */ > >> #ifdef CONFIG_CPU_HAS_SYNC > >> # define ____SYNC(_type, _reason, _else) \ > >> - .if (( _type ) != -1) && ( _reason ); \ > >> + ((_type) != -1) && (_reason); \ > >> .set push; \ > >> .set MIPS_ISA_LEVEL_RAW; \ > >> .rept __SYNC_rpt(_type); \ > >> @@ -192,13 +192,15 @@ > >> /* > >> * Preprocessor magic to expand macros used as arguments before we insert them > >> * into assembly code. > >> + * In addition,‘if’ can not be substituted when CONFIG_PROFILE_ALL_BRANCHES is > > * In addition, 'if' cannot be > > >> + * enabled. > >> */ > >> #ifdef __ASSEMBLY__ > >> # define ___SYNC(type, reason, else) \ > >> - ____SYNC(type, reason, else) > >> + .if ____SYNC(type, reason, else) > >> #else > >> # define ___SYNC(type, reason, else) \ > >> - __stringify(____SYNC(type, reason, else)) > >> + ".if" __stringify(____SYNC(type, reason, else)) > >> #endif > >> > >> #define __SYNC(type, reason) \ > >> -- > >> 2.25.1 > > > Is this problem that you are fixing being aggravated (caused) by > the #define of if() in include/linux/compiler.h when CONFIG_PROFILE_ALL_BRANCHES > is set? I suspect that it is. right . > It wouldn't hurt to mention that (if I am correct). > > Thanks. > -- > ~Randy Thank you for your suggestions. I will send a patch v2.