From: Eric Biggers <ebiggers@xxxxxxxxxx>
Add a helper function that encapsulates a container_of expression. For
now there is just one user but soon there will be more.
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
drivers/mmc/host/cqhci-crypto.c | 5 +----
include/linux/mmc/host.h | 8 ++++++++
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/cqhci-crypto.c b/drivers/mmc/host/cqhci-crypto.c
index d5f4b6972f63..2951911d3f78 100644
--- a/drivers/mmc/host/cqhci-crypto.c
+++ b/drivers/mmc/host/cqhci-crypto.c
@@ -23,14 +23,11 @@ static const struct cqhci_crypto_alg_entry {
};
static inline struct cqhci_host *
cqhci_host_from_crypto_profile(struct blk_crypto_profile *profile)
{
- struct mmc_host *mmc =
- container_of(profile, struct mmc_host, crypto_profile);
-
- return mmc->cqe_private;
+ return mmc_from_crypto_profile(profile)->cqe_private;
}
static int cqhci_crypto_program_key(struct cqhci_host *cq_host,
const union cqhci_crypto_cfg_entry *cfg,
int slot)
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index f166d6611ddb..68f09a955a90 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -588,10 +588,18 @@ static inline void *mmc_priv(struct mmc_host *host)
static inline struct mmc_host *mmc_from_priv(void *priv)
{
return container_of(priv, struct mmc_host, private);
}
+#ifdef CONFIG_MMC_CRYPTO
+static inline struct mmc_host *
+mmc_from_crypto_profile(struct blk_crypto_profile *profile)
+{
+ return container_of(profile, struct mmc_host, crypto_profile);
+}
+#endif
+
#define mmc_host_is_spi(host) ((host)->caps & MMC_CAP_SPI)
#define mmc_dev(x) ((x)->parent)
#define mmc_classdev(x) (&(x)->class_dev)
#define mmc_hostname(x) (dev_name(&(x)->class_dev))
--
2.47.1
