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create-diff-object: Mark correlated static local variables the SAME initially

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Normal correlated symbols are marked the SAME initially but static local
variables are correlated in a separate function. Also mark these the
SAME.

This fixes an issue where patching a function which called printk_once
(which uses a static local variable) would fail to build because the
static local variable was considered new and thus introduced a new data
member into .data..read_mostly which is not allowed to change.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
This commit is contained in:
Ross Lagerwall 2017-02-28 15:32:46 +00:00
parent fd911ab66c
commit 09ef2457cd
1 changed files with 3 additions and 0 deletions
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3
kpatch-build/create-diff-object.c
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@ -767,6 +767,9 @@ static void kpatch_correlate_static_local_variables(struct kpatch_elf *base,
sym->twin = patched_sym;
patched_sym->twin = sym;
/* set initial status, might change */
sym->status = patched_sym->status = SAME;
if (bundled) {
sym->sec->twin = patched_sym->sec;
patched_sym->sec->twin = sym->sec;