linux-kernel - [PATCH 20/26] stmmac: pci: constify local structures

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Date:   Sun, 11 Sep 2016 15:06:02 +0200
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc:     joe@...ches.com, kernel-janitors@...r.kernel.org,
        Alexandre Torgue <alexandre.torgue@...com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 20/26] stmmac: pci: constify local structures

For structure types defined in the same file or local header files, find
top-level static structure declarations that have the following
properties:
1. Never reassigned.
2. Address never taken
3. Not passed to a top-level macro call
4. No pointer or array-typed field passed to a function or stored in a
variable.
Declare structures having all of these properties as const.

Done using Coccinelle.
Based on a suggestion by Joe Perches <joe@...ches.com>.

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
The semantic patch seems too long for a commit log, but is in the cover
letter.

 drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
index 56c8a23..5c612c3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
@@ -141,7 +141,7 @@ static struct stmmac_pci_dmi_data quark_pci_dmi_data[] = {
 	{}
 };
 
-static struct stmmac_pci_info quark_pci_info = {
+static const struct stmmac_pci_info quark_pci_info = {
 	.setup = quark_default_data,
 	.dmi = quark_pci_dmi_data,
 };