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improve find_[symbol|section]_by_index

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The indexes are in order when being read from the
table.  Just index directly into the table; a benefit
of using an array for this structure instead of a linked
list.

Removes another hot path during the rela table initialization.

Signed-off-by: Seth Jennings <sjenning@redhat.com>
This commit is contained in:
Seth Jennings 2014-03-24 17:56:21 -05:00
parent 24894d263c
commit 634b9cee78
1 changed files with 6 additions and 16 deletions
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18
kpatch-build/create-diff-object.c
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@ -173,14 +173,9 @@ int is_rela_section(struct section *sec)
struct section *find_section_by_index(struct table *table, unsigned int index) struct section *find_section_by_index(struct table *table, unsigned int index)
{ {
struct section *sec; if (index == 0 || index >= table->nr)
int i;
for_each_section(i, sec, table)
if (sec->index == index)
return sec;
return NULL; return NULL;
return &((struct section *)(table->data))[index-1];
} }
struct section *find_section_by_name(struct table *table, const char *name) struct section *find_section_by_name(struct table *table, const char *name)
@ -197,14 +192,9 @@ struct section *find_section_by_name(struct table *table, const char *name)
struct symbol *find_symbol_by_index(struct table *table, size_t index) struct symbol *find_symbol_by_index(struct table *table, size_t index)
{ {
struct symbol *sym; if (index >= table->nr)
int i;
for_each_symbol_zero(i, sym, table)
if (sym->index == index)
return sym;
return NULL; return NULL;
return &((struct symbol *)(table->data))[index];
} }
struct symbol *find_symbol_by_name(struct table *table, const char *name) struct symbol *find_symbol_by_name(struct table *table, const char *name)