[PATCH] binfmt: move more stuff undef CONFIG_COREDUMP

From: Alexey Dobriyan
Date: Sun Feb 13 2022 - 14:25:37 EST


struct linux_binfmt::core_dump and struct min_coredump::min_coredump
are used under CONFIG_COREDUMP only. Shrink those embedded configs
a bit.

Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---

fs/binfmt_elf.c | 2 ++
fs/binfmt_elf_fdpic.c | 2 +-
fs/binfmt_flat.c | 2 ++
include/linux/binfmts.h | 2 ++
4 files changed, 7 insertions(+), 1 deletion(-)

--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -101,8 +101,10 @@ static struct linux_binfmt elf_format = {
.module = THIS_MODULE,
.load_binary = load_elf_binary,
.load_shlib = load_elf_library,
+#ifdef CONFIG_COREDUMP
.core_dump = elf_core_dump,
.min_coredump = ELF_EXEC_PAGESIZE,
+#endif
};

#define BAD_ADDR(x) (unlikely((unsigned long)(x) >= TASK_SIZE))
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -83,8 +83,8 @@ static struct linux_binfmt elf_fdpic_format = {
.load_binary = load_elf_fdpic_binary,
#ifdef CONFIG_ELF_CORE
.core_dump = elf_fdpic_core_dump,
-#endif
.min_coredump = ELF_EXEC_PAGESIZE,
+#endif
};

static int __init init_elf_fdpic_binfmt(void)
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -102,8 +102,10 @@ static int flat_core_dump(struct coredump_params *cprm);
static struct linux_binfmt flat_format = {
.module = THIS_MODULE,
.load_binary = load_flat_binary,
+#ifdef CONFIG_COREDUMP
.core_dump = flat_core_dump,
.min_coredump = PAGE_SIZE
+#endif
};

/****************************************************************************/
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -98,8 +98,10 @@ struct linux_binfmt {
struct module *module;
int (*load_binary)(struct linux_binprm *);
int (*load_shlib)(struct file *);
+#ifdef CONFIG_COREDUMP
int (*core_dump)(struct coredump_params *cprm);
unsigned long min_coredump; /* minimal dump size */
+#endif
} __randomize_layout;

extern void __register_binfmt(struct linux_binfmt *fmt, int insert);