linux-kernel - [PATCH 06/12] mmc: toshsd: constify mmc_host

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Date:   Sat, 29 Jul 2017 07:59:35 +0200
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     bhumirks@...il.com, kernel-janitors@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 06/12] mmc: toshsd: constify mmc_host_ops structures

The mmc_host_ops structure is only stored in the ops field of an
mmc_host structure, which is declared as const.  Thus the mmc_host_ops
structure itself can be const.

Done with the help of Coccinelle.

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct mmc_host_ops i@p = { ... };

@ok1@
struct mmc_host *mmc;
identifier r.i;
position p;
@@
mmc->ops = &i@p

@bad@
position p != {r.p,ok1.p};
identifier r.i;
struct mmc_host_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct mmc_host_ops i = { ... };
// </smpl>

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

---
 drivers/mmc/host/toshsd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/toshsd.c b/drivers/mmc/host/toshsd.c
index 553ef41..dd961c5 100644
--- a/drivers/mmc/host/toshsd.c
+++ b/drivers/mmc/host/toshsd.c
@@ -550,7 +550,7 @@ static int toshsd_get_cd(struct mmc_host *mmc)
 	return !!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0);
 }
 
-static struct mmc_host_ops toshsd_ops = {
+static const struct mmc_host_ops toshsd_ops = {
 	.request = toshsd_request,
 	.set_ios = toshsd_set_ios,
 	.get_ro = toshsd_get_ro,