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consolidate variables func->old_offset and func->old_addr to just old_addr 

To reduce redundancy, remove/change the old_offset fields in the
kpatch_func and kpatch_patch_func structs to just old_addr. Since
old_offset is being used as a placeholder for old_addr, might as well
consolidate it to just one variable.
This commit is contained in:
Jessica Yu 2014-08-14 09:23:33 -07:00
parent 8464c25d95
commit 6a69f5f91a
5 changed files with 8 additions and 11 deletions
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9
kmod/core/core.c
View File

@ -711,16 +711,15 @@ static int kpatch_link_object(struct kpatch_module *kpmod,
goto err_unlink;
list_for_each_entry(func, &object->funcs, list) {
unsigned long old_addr;
/* calculate actual old location */
if (vmlinux) {
old_addr = func->old_offset;
ret = kpatch_verify_symbol_match(func->name,
old_addr);
func->old_addr);
if (ret)
goto err_unlink;
} else {
unsigned long old_addr;
old_addr = kpatch_find_module_symbol(mod, func->name);
if (!old_addr) {
pr_err("unable to find symbol '%s' in module '%s\n",
@ -728,14 +727,14 @@ static int kpatch_link_object(struct kpatch_module *kpmod,
ret = -EINVAL;
goto err_unlink;
}
func->old_addr = old_addr;
}
/* add to ftrace filter and register handler if needed */
ret = kpatch_ftrace_add_func(old_addr);
ret = kpatch_ftrace_add_func(func->old_addr);
if (ret)
goto err_unlink;
func->old_addr = old_addr;
}
return 0;

3
kmod/core/kpatch.h
View File

@ -36,7 +36,7 @@ struct kpatch_func {
/* public */
unsigned long new_addr;
unsigned long new_size;
unsigned long old_offset;
unsigned long old_addr;
unsigned long old_size;
const char *name;
struct list_head list;
@ -44,7 +44,6 @@ struct kpatch_func {
/* private */
struct hlist_node node;
unsigned long old_addr;
enum kpatch_op op;
};

3
kmod/patch/kpatch-patch-hook.c
View File

@ -257,9 +257,8 @@ static int patch_make_funcs_list(struct list_head *objects)
func->new_addr = p_func->new_addr;
func->new_size = p_func->new_size;
/* find correct func->old_offset */
if (!strcmp("vmlinux", object->name))
func->old_offset = p_func->old_offset;
func->old_addr = p_func->old_addr;
else
func->old_addr = 0x0;

2
kmod/patch/kpatch-patch.h
View File

@ -25,7 +25,7 @@
struct kpatch_patch_func {
unsigned long new_addr;
unsigned long new_size;
unsigned long old_offset;
unsigned long old_addr;
unsigned long old_size;
char *name;
char *objname;

2
kpatch-build/create-diff-object.c
View File

@ -1983,7 +1983,7 @@ void kpatch_create_patches_sections(struct kpatch_elf *kelf,
sym->name, result.value, result.size);
/* add entry in text section */
funcs[index].old_offset = result.value;
funcs[index].old_addr = result.value;
funcs[index].old_size = result.size;
funcs[index].new_size = sym->sym.st_size;