Re: [PATCH 2/2] binfmt: Slightly simplify elf_fdpic_map_file()

From: Eric W. Biederman
Date: Sun May 28 2023 - 12:34:28 EST


Christophe JAILLET <christophe.jaillet@xxxxxxxxxx> writes:

> There is no point in initializing 'load_addr' and 'seg' here, they are both
> re-written just before being used below.
>
> Doing so, 'load_addr' can be moved in the #ifdef CONFIG_MMU section.
>

Acked-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>

Kees do you maybe want to pick these trivial fixes up?

> Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
> ---
> Compile tested on arm, with and without CONFIG_MMU
> ---
> fs/binfmt_elf_fdpic.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
> index 237ce388d06d..1c6c5832af86 100644
> --- a/fs/binfmt_elf_fdpic.c
> +++ b/fs/binfmt_elf_fdpic.c
> @@ -743,11 +743,12 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
> struct elf32_fdpic_loadmap *loadmap;
> #ifdef CONFIG_MMU
> struct elf32_fdpic_loadseg *mseg;
> + unsigned long load_addr;
> #endif
> struct elf32_fdpic_loadseg *seg;
> struct elf32_phdr *phdr;
> - unsigned long load_addr, stop;
> unsigned nloads, tmp;
> + unsigned long stop;
> int loop, ret;
>
> /* allocate a load map table */
> @@ -768,9 +769,6 @@ static int elf_fdpic_map_file(struct elf_fdpic_params *params,
> loadmap->version = ELF32_FDPIC_LOADMAP_VERSION;
> loadmap->nsegs = nloads;
>
> - load_addr = params->load_addr;
> - seg = loadmap->segs;
> -
> /* map the requested LOADs into the memory space */
> switch (params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) {
> case ELF_FDPIC_FLAG_CONSTDISP: