[PATCH 3/3] Fix a few compilation warnings.

[Simon Horman]

On Mon, Feb 09, 2015 at 08:56:25PM +0800, Yousong Zhou wrote:
> On 9 February 2015 at 13:58, Simon Horman <horms at verge.net.au> wrote:
> > These changes do not seem to be related to each other.
> > Please split this into 4 separate patches each with
> > a changelog that briefly describes what the problem is.
> >
> 
> Will split them each into a separate patch.
> 
> > On Sun, Feb 01, 2015 at 12:10:08AM +0800, Yousong Zhou wrote:
> >>
> >> Signed-off-by: Yousong Zhou <yszhou4tech at gmail.com>
> >> ---
> >>  kexec/arch/mips/crashdump-mips.c |    3 ++-
> >>  kexec/arch/mips/kexec-elf-mips.c |    2 +-
> >>  kexec/kexec-elf-rel.c            |    3 +++
> >>  kexec/kexec.h                    |    2 +-
> >>  4 files changed, 7 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/kexec/arch/mips/crashdump-mips.c b/kexec/arch/mips/crashdump-mips.c
> >> index e7840e0..98c9f7c 100644
> >> --- a/kexec/arch/mips/crashdump-mips.c
> >> +++ b/kexec/arch/mips/crashdump-mips.c
> >> @@ -22,6 +22,7 @@
> >>  #include <stdlib.h>
> >>  #include <errno.h>
> >>  #include <limits.h>
> >> +#include <inttypes.h>
> >>  #include <elf.h>
> >>  #include <sys/types.h>
> >>  #include <sys/stat.h>
> >> @@ -52,7 +53,7 @@ static int get_kernel_paddr(struct crash_elf_info *elf_info)
> >>
> >>       if (parse_iomem_single("Kernel code\n", &start, NULL) == 0) {
> >>               elf_info->kern_paddr_start = start;
> >> -             dbgprintf("kernel load physical addr start = 0x%lx\n", start);
> >> +             dbgprintf("kernel load physical addr start = 0x%" PRIu64 "\n", start);
> >>               return 0;
> >>       }
> >>
> >> diff --git a/kexec/arch/mips/kexec-elf-mips.c b/kexec/arch/mips/kexec-elf-mips.c
> >> index a27d986..8a6419a 100644
> >> --- a/kexec/arch/mips/kexec-elf-mips.c
> >> +++ b/kexec/arch/mips/kexec-elf-mips.c
> >> @@ -158,7 +158,7 @@ int elf_mips_load(int argc, char **argv, const char *buf, off_t len,
> >>       if (info->kexec_flags & KEXEC_ON_CRASH)
> >>               /* In case of crashdump segment[0] is kernel.
> >>                * Put cmdline just after it. */
> >> -             cmdline_addr = info->segment[0].mem +
> >> +             cmdline_addr = (unsigned long)info->segment[0].mem +
> >>                               info->segment[0].memsz;
> >
> > I wonder if we can resolve this without resorting to a cast.
> 
> It's a "pointer to integer without cast" warning.  I think keeping
> (unsigned long) for a pointer is fine, isnt it?

Yes, I guess it is the least-bad solution.

> 
> >
> >>       else
> >>               cmdline_addr = 0;
> >> diff --git a/kexec/kexec-elf-rel.c b/kexec/kexec-elf-rel.c
> >> index c625f30..5a5fcd1 100644
> >> --- a/kexec/kexec-elf-rel.c
> >> +++ b/kexec/kexec-elf-rel.c
> >> @@ -347,6 +347,9 @@ int elf_rel_load(struct mem_ehdr *ehdr, struct kexec_info *info,
> >>                       else if (shdr->sh_type == SHT_RELA) {
> >>                               rel = elf_rela(ehdr, ptr);
> >>                       }
> >> +                     else {
> >> +                             die("Unexpected sh_type: %d\n", shdr->sh_type);
> >> +                     }
> >>                       /* the location to change */
> >>                       location = section->sh_data + rel.r_offset;
> >>
> 
> This one has already been fixed by explicitly initialising the local
> variable.  So I will drop it in the next version.
> 
> Thank you for your time on this.

Likewise, thanks for spending time on this.

>                 yousong
> 
> >> diff --git a/kexec/kexec.h b/kexec/kexec.h
> >> index 4be2b2f..2c85052 100644
> >> --- a/kexec/kexec.h
> >> +++ b/kexec/kexec.h
> >> @@ -245,7 +245,7 @@ extern int file_types;
> >>
> >>  extern void dbgprint_mem_range(const char *prefix, struct memory_range *mr, int nr_mr);
> >>  extern void die(const char *fmt, ...)
> >> -     __attribute__ ((format (printf, 1, 2)));
> >> +     __attribute__ ((format (printf, 1, 2), noreturn));
> >>  extern void *xmalloc(size_t size);
> >>  extern void *xrealloc(void *ptr, size_t size);
> >>  extern char *slurp_file(const char *filename, off_t *r_size);
> >> --
> >> 1.7.10.4
> >>
> 
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