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Date: Sat, 23 Oct 2010 14:01:50 +0200
From: Mikael Pettersson <mikpe@...uu.se>
To: linux-kernel@...r.kernel.org
Subject: [PATCH] binfmt_elf cleanups
This cleans up a few bits in binfmt_elf.c and binfmts.h:
- the hasvdso field in struct linux_binfmt is unused, so
remove it and the only initialization of it
- the elf_map CPP symbol is not defined anywhere in the kernel,
so remove an unnecessary #ifndef elf_map
- reduce excessive indentation in elf_format's initializer
- add missing spaces, remove extraneous spaces
No functional changes, but tested on x86 (32 and 64 bit),
powerpc (32 and 64 bit), sparc64, arm, and alpha.
Signed-off-by: Mikael Pettersson <mikpe@...uu.se>
----
fs/binfmt_elf.c | 23 +++++++++--------------
include/linux/binfmts.h | 5 ++---
2 files changed, 11 insertions(+), 17 deletions(-)
diff -rupN linux-2.6.36/fs/binfmt_elf.c linux-2.6.36.binfmt-cleanups/fs/binfmt_elf.c
--- linux-2.6.36/fs/binfmt_elf.c 2010-05-17 19:51:31.000000000 +0200
+++ linux-2.6.36.binfmt-cleanups/fs/binfmt_elf.c 2010-10-22 08:55:49.000000000 +0200
@@ -66,12 +66,11 @@ static int elf_core_dump(struct coredump
#define ELF_PAGEALIGN(_v) (((_v) + ELF_MIN_ALIGN - 1) & ~(ELF_MIN_ALIGN - 1))
static struct linux_binfmt elf_format = {
- .module = THIS_MODULE,
- .load_binary = load_elf_binary,
- .load_shlib = load_elf_library,
- .core_dump = elf_core_dump,
- .min_coredump = ELF_EXEC_PAGESIZE,
- .hasvdso = 1
+ .module = THIS_MODULE,
+ .load_binary = load_elf_binary,
+ .load_shlib = load_elf_library,
+ .core_dump = elf_core_dump,
+ .min_coredump = ELF_EXEC_PAGESIZE,
};
#define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE)
@@ -316,8 +315,6 @@ create_elf_tables(struct linux_binprm *b
return 0;
}
-#ifndef elf_map
-
static unsigned long elf_map(struct file *filep, unsigned long addr,
struct elf_phdr *eppnt, int prot, int type,
unsigned long total_size)
@@ -354,8 +351,6 @@ static unsigned long elf_map(struct file
return(map_addr);
}
-#endif /* !elf_map */
-
static unsigned long total_mapping_size(struct elf_phdr *cmds, int nr)
{
int i, first_idx = -1, last_idx = -1;
@@ -421,7 +416,7 @@ static unsigned long load_elf_interp(str
goto out;
retval = kernel_read(interpreter, interp_elf_ex->e_phoff,
- (char *)elf_phdata,size);
+ (char *)elf_phdata, size);
error = -EIO;
if (retval != size) {
if (retval < 0)
@@ -601,7 +596,7 @@ static int load_elf_binary(struct linux_
goto out;
if (!elf_check_arch(&loc->elf_ex))
goto out;
- if (!bprm->file->f_op||!bprm->file->f_op->mmap)
+ if (!bprm->file->f_op || !bprm->file->f_op->mmap)
goto out;
/* Now read in all of the header information */
@@ -761,8 +756,8 @@ static int load_elf_binary(struct linux_
/* There was a PT_LOAD segment with p_memsz > p_filesz
before this one. Map anonymous pages, if needed,
and clear the area. */
- retval = set_brk (elf_bss + load_bias,
- elf_brk + load_bias);
+ retval = set_brk(elf_bss + load_bias,
+ elf_brk + load_bias);
if (retval) {
send_sig(SIGKILL, current, 0);
goto out_free_dentry;
diff -rupN linux-2.6.36/include/linux/binfmts.h linux-2.6.36.binfmt-cleanups/include/linux/binfmts.h
--- linux-2.6.36/include/linux/binfmts.h 2010-10-22 08:52:13.000000000 +0200
+++ linux-2.6.36.binfmt-cleanups/include/linux/binfmts.h 2010-10-22 08:55:49.000000000 +0200
@@ -25,7 +25,7 @@ struct pt_regs;
/*
* This structure is used to hold the arguments that are used when loading binaries.
*/
-struct linux_binprm{
+struct linux_binprm {
char buf[BINPRM_BUF_SIZE];
#ifdef CONFIG_MMU
struct vm_area_struct *vma;
@@ -88,7 +88,6 @@ struct linux_binfmt {
int (*load_shlib)(struct file *);
int (*core_dump)(struct coredump_params *cprm);
unsigned long min_coredump; /* minimal dump size */
- int hasvdso;
};
extern int __register_binfmt(struct linux_binfmt *fmt, int insert);
@@ -108,7 +107,7 @@ extern void unregister_binfmt(struct lin
extern int prepare_binprm(struct linux_binprm *);
extern int __must_check remove_arg_zero(struct linux_binprm *);
-extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
+extern int search_binary_handler(struct linux_binprm *, struct pt_regs *);
extern int flush_old_exec(struct linux_binprm * bprm);
extern void setup_new_exec(struct linux_binprm * bprm);
--
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