[PATCH v2 21/50] hash: Drop some #ifdefs in hash.c

[Alex G.]

On 5/6/21 9:24 AM, Simon Glass wrote:
> We can use the __maybe_unused attribute to avoid some of the #ifdefs in
> this file. Update the functions accordingly.

What is __maybe_unused? Does u-boot support booting quantum computers?


> Note: The actual hashing interface is still a mess, with four separate
> combinations and lots of #ifdefs. This should really use a driver
> approach, e.g. as is done with partition drivers.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> 
> (no changes since v1)
> 
>   common/hash.c | 54 ++++++++++++++++++++++++---------------------------
>   1 file changed, 25 insertions(+), 29 deletions(-)
> 
> diff --git a/common/hash.c b/common/hash.c
> index 987d238c66c..1ccc62f162d 100644
> --- a/common/hash.c
> +++ b/common/hash.c
> @@ -24,6 +24,7 @@
>   #include <u-boot/crc.h>
>   #else
>   #include "mkimage.h"
> +#include <linux/compiler_attributes.h>
>   #include <time.h>
>   #include <linux/kconfig.h>
>   #endif /* !USE_HOSTCC*/
> @@ -42,8 +43,7 @@ DECLARE_GLOBAL_DATA_PTR;
>   
>   static void reloc_update(void);
>   
> -#if CONFIG_IS_ENABLED(SHA1) && !CONFIG_IS_ENABLED(SHA_PROG_HW_ACCEL)
> -static int hash_init_sha1(struct hash_algo *algo, void **ctxp)
> +static int __maybe_unused hash_init_sha1(struct hash_algo *algo, void **ctxp)
>   {
>   	sha1_context *ctx = malloc(sizeof(sha1_context));
>   	sha1_starts(ctx);
> @@ -51,15 +51,16 @@ static int hash_init_sha1(struct hash_algo *algo, void **ctxp)
>   	return 0;
>   }
>   
> -static int hash_update_sha1(struct hash_algo *algo, void *ctx, const void *buf,
> -			    unsigned int size, int is_last)
> +static int __maybe_unused hash_update_sha1(struct hash_algo *algo, void *ctx,
> +					   const void *buf, unsigned int size,
> +					   int is_last)
>   {
>   	sha1_update((sha1_context *)ctx, buf, size);
>   	return 0;
>   }
>   
> -static int hash_finish_sha1(struct hash_algo *algo, void *ctx, void *dest_buf,
> -			    int size)
> +static int __maybe_unused hash_finish_sha1(struct hash_algo *algo, void *ctx,
> +					   void *dest_buf, int size)
>   {
>   	if (size < algo->digest_size)
>   		return -1;
> @@ -68,10 +69,8 @@ static int hash_finish_sha1(struct hash_algo *algo, void *ctx, void *dest_buf,
>   	free(ctx);
>   	return 0;
>   }
> -#endif
>   
> -#if CONFIG_IS_ENABLED(SHA256) && !CONFIG_IS_ENABLED(SHA_PROG_HW_ACCEL)
> -static int hash_init_sha256(struct hash_algo *algo, void **ctxp)
> +static int __maybe_unused hash_init_sha256(struct hash_algo *algo, void **ctxp)
>   {
>   	sha256_context *ctx = malloc(sizeof(sha256_context));
>   	sha256_starts(ctx);
> @@ -79,15 +78,16 @@ static int hash_init_sha256(struct hash_algo *algo, void **ctxp)
>   	return 0;
>   }
>   
> -static int hash_update_sha256(struct hash_algo *algo, void *ctx,
> -			      const void *buf, unsigned int size, int is_last)
> +static int __maybe_unused hash_update_sha256(struct hash_algo *algo, void *ctx,
> +					     const void *buf, uint size,
> +					     int is_last)
>   {
>   	sha256_update((sha256_context *)ctx, buf, size);
>   	return 0;
>   }
>   
> -static int hash_finish_sha256(struct hash_algo *algo, void *ctx, void
> -			      *dest_buf, int size)
> +static int __maybe_unused hash_finish_sha256(struct hash_algo *algo, void *ctx,
> +					     void *dest_buf, int size)
>   {
>   	if (size < algo->digest_size)
>   		return -1;
> @@ -96,10 +96,8 @@ static int hash_finish_sha256(struct hash_algo *algo, void *ctx, void
>   	free(ctx);
>   	return 0;
>   }
> -#endif
>   
> -#if CONFIG_IS_ENABLED(SHA384) && !CONFIG_IS_ENABLED(SHA_PROG_HW_ACCEL)
> -static int hash_init_sha384(struct hash_algo *algo, void **ctxp)
> +static int __maybe_unused hash_init_sha384(struct hash_algo *algo, void **ctxp)
>   {
>   	sha512_context *ctx = malloc(sizeof(sha512_context));
>   	sha384_starts(ctx);
> @@ -107,15 +105,16 @@ static int hash_init_sha384(struct hash_algo *algo, void **ctxp)
>   	return 0;
>   }
>   
> -static int hash_update_sha384(struct hash_algo *algo, void *ctx,
> -			      const void *buf, unsigned int size, int is_last)
> +static int __maybe_unused hash_update_sha384(struct hash_algo *algo, void *ctx,
> +					     const void *buf, uint size,
> +					     int is_last)
>   {
>   	sha384_update((sha512_context *)ctx, buf, size);
>   	return 0;
>   }
>   
> -static int hash_finish_sha384(struct hash_algo *algo, void *ctx, void
> -			      *dest_buf, int size)
> +static int __maybe_unused hash_finish_sha384(struct hash_algo *algo, void *ctx,
> +					     void *dest_buf, int size)
>   {
>   	if (size < algo->digest_size)
>   		return -1;
> @@ -124,10 +123,8 @@ static int hash_finish_sha384(struct hash_algo *algo, void *ctx, void
>   	free(ctx);
>   	return 0;
>   }
> -#endif
>   
> -#if CONFIG_IS_ENABLED(SHA512) && !CONFIG_IS_ENABLED(SHA_PROG_HW_ACCEL)
> -static int hash_init_sha512(struct hash_algo *algo, void **ctxp)
> +static int __maybe_unused hash_init_sha512(struct hash_algo *algo, void **ctxp)
>   {
>   	sha512_context *ctx = malloc(sizeof(sha512_context));
>   	sha512_starts(ctx);
> @@ -135,15 +132,16 @@ static int hash_init_sha512(struct hash_algo *algo, void **ctxp)
>   	return 0;
>   }
>   
> -static int hash_update_sha512(struct hash_algo *algo, void *ctx,
> -			      const void *buf, unsigned int size, int is_last)
> +static int __maybe_unused hash_update_sha512(struct hash_algo *algo, void *ctx,
> +					     const void *buf, uint size,
> +					     int is_last)
>   {
>   	sha512_update((sha512_context *)ctx, buf, size);
>   	return 0;
>   }
>   
> -static int hash_finish_sha512(struct hash_algo *algo, void *ctx, void
> -			      *dest_buf, int size)
> +static int __maybe_unused hash_finish_sha512(struct hash_algo *algo, void *ctx,
> +					     void *dest_buf, int size)
>   {
>   	if (size < algo->digest_size)
>   		return -1;
> @@ -152,8 +150,6 @@ static int hash_finish_sha512(struct hash_algo *algo, void *ctx, void
>   	free(ctx);
>   	return 0;
>   }
> -#endif
> -
>   
>   static int hash_init_crc16_ccitt(struct hash_algo *algo, void **ctxp)
>   {
>