Re: [Outreachy kernel] Re: [PATCH 3/5] staging: lustre: lustre: Remove unnecessary cast on void pointer

2017-03-02 Thread Julia Lawall 


On Fri, 3 Mar 2017, SIMRAN SINGHAL wrote:

> On Fri, Mar 3, 2017 at 3:29 AM, Joe Perches  wrote:
> > On Fri, 2017-03-03 at 03:25 +0530, SIMRAN SINGHAL wrote:
> >> On Fri, Mar 3, 2017 at 3:13 AM, Joe Perches  wrote:
> >> > On Fri, 2017-03-03 at 02:49 +0530, simran singhal wrote:
> >> > > The following Coccinelle script was used to detect this:
> >> > > @r@
> >> > > expression x;
> >> > > void* e;
> >> > > type T;
> >> > > identifier f;
> >> > > @@
> >> > > (
> >> > >   *((T *)e)
> >> > > >
> >> > >
> >> > >   ((T *)x)[...]
> >> > > >
> >> > >
> >> > >   ((T*)x)->f
> >> > > >
> >> > >
> >> > > - (T*)
> >> > >   e
> >> > > )
> >> >
> >> > NAK.
> >> >
> >> > Nice, but you still have to verify correctness
> >> > before submitting these patches.
> >> >
> >> > > diff --git a/drivers/staging/lustre/lustre/mgc/mgc_request.c 
> >> > > b/drivers/staging/lustre/lustre/mgc/mgc_request.c
> >> >
> >> > []
> >> > > @@ -1034,7 +1034,7 @@ static int mgc_set_info_async(const struct 
> >> > > lu_env *env, struct obd_export *exp,
> >> > >   rc = sptlrpc_parse_flavor(val, );
> >> > >   if (rc) {
> >> > >   CERROR("invalid sptlrpc flavor %s to MGS\n",
> >> > > -(char *)val);
> >> > > +val);
> >> >
> >> > Try compiling this.
> >> >
> >>
> >> I compiled it before sending.
> >
> > Did you look at the warnings?
> >
> >   CC [M]  drivers/staging/lustre/lustre/mgc/mgc_request.o
> > drivers/staging/lustre/lustre/mgc/mgc_request.c: In function 
> > ‘mgc_set_info_async’:
> > drivers/staging/lustre/lustre/mgc/mgc_request.c:1036:115: warning: format 
> > ‘%s’ expects argument of type ‘char *’, but argument 3 has type ‘void *’ 
> > [-Wformat=]
> > CERROR("invalid sptlrpc flavor %s to MGS\n",
> >
>
> I again compiled it and this is what I got :-
>
>   CHK include/config/kernel.release
>   CHK include/generated/uapi/linux/version.h
>   CHK include/generated/utsrelease.h
>   CHK include/generated/timeconst.h
>   CHK include/generated/bounds.h
>   CHK include/generated/asm-offsets.h
>   CALLscripts/checksyscalls.sh
>   CHK include/generated/compile.h
>   LD  arch/x86/boot/compressed/vmlinux
>   ZOFFSET arch/x86/boot/zoffset.h
>   AS  arch/x86/boot/header.o
>   LD  arch/x86/boot/setup.elf
>   OBJCOPY arch/x86/boot/setup.bin
>   OBJCOPY arch/x86/boot/vmlinux.bin
>   BUILD   arch/x86/boot/bzImage
> Setup is 17500 bytes (padded to 17920 bytes).
> System is 7128 kB
> CRC 37713343
> Kernel: arch/x86/boot/bzImage is ready  (#4)
>   Building modules, stage 2.
>   MODPOST 4541 modules
>
> I am not getting any warning.

Did you touch the .c file before compiling it?  Warnings still allow the
creation of a .o, and once there is a .o that s more recent than the .c,
make won't compile it again.

I got a whole of host of warnings, including the ones Joe showed.

julia

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Re: [Outreachy kernel] Re: [PATCH 3/5] staging: lustre: lustre: Remove unnecessary cast on void pointer

2017-03-02 Thread Julia Lawall 


On Fri, 3 Mar 2017, SIMRAN SINGHAL wrote:

> On Fri, Mar 3, 2017 at 3:29 AM, Joe Perches  wrote:
> > On Fri, 2017-03-03 at 03:25 +0530, SIMRAN SINGHAL wrote:
> >> On Fri, Mar 3, 2017 at 3:13 AM, Joe Perches  wrote:
> >> > On Fri, 2017-03-03 at 02:49 +0530, simran singhal wrote:
> >> > > The following Coccinelle script was used to detect this:
> >> > > @r@
> >> > > expression x;
> >> > > void* e;
> >> > > type T;
> >> > > identifier f;
> >> > > @@
> >> > > (
> >> > >   *((T *)e)
> >> > > >
> >> > >
> >> > >   ((T *)x)[...]
> >> > > >
> >> > >
> >> > >   ((T*)x)->f
> >> > > >
> >> > >
> >> > > - (T*)
> >> > >   e
> >> > > )
> >> >
> >> > NAK.
> >> >
> >> > Nice, but you still have to verify correctness
> >> > before submitting these patches.
> >> >
> >> > > diff --git a/drivers/staging/lustre/lustre/mgc/mgc_request.c 
> >> > > b/drivers/staging/lustre/lustre/mgc/mgc_request.c
> >> >
> >> > []
> >> > > @@ -1034,7 +1034,7 @@ static int mgc_set_info_async(const struct 
> >> > > lu_env *env, struct obd_export *exp,
> >> > >   rc = sptlrpc_parse_flavor(val, );
> >> > >   if (rc) {
> >> > >   CERROR("invalid sptlrpc flavor %s to MGS\n",
> >> > > -(char *)val);
> >> > > +val);
> >> >
> >> > Try compiling this.
> >> >
> >>
> >> I compiled it before sending.
> >
> > Did you look at the warnings?
> >
> >   CC [M]  drivers/staging/lustre/lustre/mgc/mgc_request.o
> > drivers/staging/lustre/lustre/mgc/mgc_request.c: In function 
> > ‘mgc_set_info_async’:
> > drivers/staging/lustre/lustre/mgc/mgc_request.c:1036:115: warning: format 
> > ‘%s’ expects argument of type ‘char *’, but argument 3 has type ‘void *’ 
> > [-Wformat=]
> > CERROR("invalid sptlrpc flavor %s to MGS\n",
> >
>
> I again compiled it and this is what I got :-
>
>   CHK include/config/kernel.release
>   CHK include/generated/uapi/linux/version.h
>   CHK include/generated/utsrelease.h
>   CHK include/generated/timeconst.h
>   CHK include/generated/bounds.h
>   CHK include/generated/asm-offsets.h
>   CALLscripts/checksyscalls.sh
>   CHK include/generated/compile.h
>   LD  arch/x86/boot/compressed/vmlinux
>   ZOFFSET arch/x86/boot/zoffset.h
>   AS  arch/x86/boot/header.o
>   LD  arch/x86/boot/setup.elf
>   OBJCOPY arch/x86/boot/setup.bin
>   OBJCOPY arch/x86/boot/vmlinux.bin
>   BUILD   arch/x86/boot/bzImage
> Setup is 17500 bytes (padded to 17920 bytes).
> System is 7128 kB
> CRC 37713343
> Kernel: arch/x86/boot/bzImage is ready  (#4)
>   Building modules, stage 2.
>   MODPOST 4541 modules
>
> I am not getting any warning.

Did you touch the .c file before compiling it?  Warnings still allow the
creation of a .o, and once there is a .o that s more recent than the .c,
make won't compile it again.

I got a whole of host of warnings, including the ones Joe showed.

julia

>
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> You received this message because you are subscribed to the Google Groups 
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> To unsubscribe from this group and stop receiving emails from it, send an 
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> To view this discussion on the web visit 
> https://groups.google.com/d/msgid/outreachy-kernel/CALrZqyP6S2mwYUBERerLnG99qVSFm5jHppjy695JARHMfZ-5Pw%40mail.gmail.com.
> For more options, visit https://groups.google.com/d/optout.
>