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coredump: get rid of coredump_params->written 

cprm->written is redundant with cprm->file->f_pos, so use that instead.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Omar Sandoval 2016-05-11 15:16:36 -07:00 committed by Al Viro
parent 88ae4ab980
commit a008393951
5 changed files with 8 additions and 10 deletions
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5
arch/powerpc/platforms/cell/spufs/coredump.c
View File

@ -137,6 +137,7 @@ static int spufs_arch_write_note(struct spu_context *ctx, int i,
char *name;
char fullname[80], *buf;
struct elf_note en;
size_t skip;
buf = (void *)get_zeroed_page(GFP_KERNEL);
if (!buf)
@ -171,8 +172,8 @@ static int spufs_arch_write_note(struct spu_context *ctx, int i,
if (rc < 0)
goto out;
if (!dump_skip(cprm,
roundup(cprm->written - total + sz, 4) - cprm->written))
skip = roundup(cprm->file->f_pos - total + sz, 4) - cprm->file->f_pos;
if (!dump_skip(cprm, skip))
goto Eio;
out:
free_page((unsigned long)buf);

2
fs/binfmt_elf.c
View File

@ -2273,7 +2273,7 @@ static int elf_core_dump(struct coredump_params *cprm)
goto end_coredump;
/* Align to page */
if (!dump_skip(cprm, dataoff - cprm->written))
if (!dump_skip(cprm, dataoff - cprm->file->f_pos))
goto end_coredump;
for (i = 0, vma = first_vma(current, gate_vma); vma != NULL;

2
fs/binfmt_elf_fdpic.c
View File

@ -1787,7 +1787,7 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm)
goto end_coredump;
}
if (!dump_skip(cprm, dataoff - cprm->written))
if (!dump_skip(cprm, dataoff - cprm->file->f_pos))
goto end_coredump;
if (!elf_fdpic_dump_segments(cprm))

8
fs/coredump.c
View File

@ -782,7 +782,7 @@ int dump_emit(struct coredump_params *cprm, const void *addr, int nr)
struct file *file = cprm->file;
loff_t pos = file->f_pos;
ssize_t n;
if (cprm->written + nr > cprm->limit)
if (pos + nr > cprm->limit)
return 0;
while (nr) {
if (dump_interrupted())
@ -791,7 +791,6 @@ int dump_emit(struct coredump_params *cprm, const void *addr, int nr)
if (n <= 0)
return 0;
file->f_pos = pos;
cprm->written += n;
nr -= n;
}
return 1;
@ -803,12 +802,11 @@ int dump_skip(struct coredump_params *cprm, size_t nr)
static char zeroes[PAGE_SIZE];
struct file *file = cprm->file;
if (file->f_op->llseek && file->f_op->llseek != no_llseek) {
if (cprm->written + nr > cprm->limit)
if (file->f_pos + nr > cprm->limit)
return 0;
if (dump_interrupted() ||
file->f_op->llseek(file, nr, SEEK_CUR) < 0)
return 0;
cprm->written += nr;
return 1;
} else {
while (nr > PAGE_SIZE) {
@ -823,7 +821,7 @@ EXPORT_SYMBOL(dump_skip);
int dump_align(struct coredump_params *cprm, int align)
{
unsigned mod = cprm->written & (align - 1);
unsigned mod = cprm->file->f_pos & (align - 1);
if (align & (align - 1))
return 0;
return mod ? dump_skip(cprm, align - mod) : 1;

1
include/linux/binfmts.h
View File

@ -64,7 +64,6 @@ struct coredump_params {
struct file *file;
unsigned long limit;
unsigned long mm_flags;
loff_t written;
};
/*