[PATCH RFC 1/2] Revert "lib: introduce HASH_CALCULATE option"

[Alexandru Gagniuc]

When we think of Kconfig, we usually think of features that we like
to enable or not. Ideally, we wouldn't use Kconfig to fix a build
issue, although sometimes it might make sense. With Kconfig it's hard
to guarantee that the fix is universal. We can only say that it works
for the set of tested configurations. In the majority of cases, it's
preferable to let the linker figure things out for us.

The reverted commit attempted to fix a build issue by adding an
invisible Kconfig option. This is wrong in several ways:

It invents a new Kconfig variable when CONFIG_HASH already
exists for the same purpose.
Second, hash-checksum.c makes use of the hash_progressive_lookup_algo()
symbol, which is only provided with CONFIG_HASH, but this dependency
was not expressed in the reverted patch.

It feels like Kconfig is turning into a listing of all available
source files, and a buffet to 'select' which ones to compile. The
purpose of this revert is to enable the next change to make use of
CONFIG_HASH instead of adding to Kconfig.

This reverts commit 87316da05f2fd49d3709275e64ef0c5980366ade.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
---
 common/Kconfig.boot    | 1 -
 lib/Kconfig            | 3 ---
 lib/Makefile           | 2 +-
 lib/efi_loader/Kconfig | 2 --
 4 files changed, 1 insertion(+), 7 deletions(-)

diff --git a/common/Kconfig.boot b/common/Kconfig.boot
index 3c6e77d099..89a3161f1f 100644
--- a/common/Kconfig.boot
+++ b/common/Kconfig.boot
@@ -80,7 +80,6 @@ config FIT_SIGNATURE
 	select RSA_VERIFY
 	select IMAGE_SIGN_INFO
 	select FIT_FULL_CHECK
-	select HASH_CALCULATE
 	help
 	  This option enables signature verification of FIT uImages,
 	  using a hash signed and verified using RSA. If
diff --git a/lib/Kconfig b/lib/Kconfig
index d675ab1d82..15019d2c65 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -439,9 +439,6 @@ config CRC32C
 config XXHASH
 	bool
 
-config HASH_CALCULATE
-	bool
-
 endmenu
 
 menu "Compression Support"
diff --git a/lib/Makefile b/lib/Makefile
index 0835ea292c..6825671955 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -61,7 +61,7 @@ endif
 obj-$(CONFIG_$(SPL_)ACPIGEN) += acpi/
 obj-$(CONFIG_$(SPL_)MD5) += md5.o
 obj-$(CONFIG_$(SPL_)RSA) += rsa/
-obj-$(CONFIG_HASH_CALCULATE) += hash-checksum.o
+obj-$(CONFIG_FIT_SIGNATURE) += hash-checksum.o
 obj-$(CONFIG_SHA1) += sha1.o
 obj-$(CONFIG_SHA256) += sha256.o
 obj-$(CONFIG_SHA512_ALGO) += sha512.o
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index eb5c4d6f29..c259abe033 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -174,7 +174,6 @@ config EFI_CAPSULE_AUTHENTICATE
 	select PKCS7_MESSAGE_PARSER
 	select PKCS7_VERIFY
 	select IMAGE_SIGN_INFO
-	select HASH_CALCULATE
 	default n
 	help
 	  Select this option if you want to enable capsule
@@ -343,7 +342,6 @@ config EFI_SECURE_BOOT
 	select X509_CERTIFICATE_PARSER
 	select PKCS7_MESSAGE_PARSER
 	select PKCS7_VERIFY
-	select HASH_CALCULATE
 	default n
 	help
 	  Select this option to enable EFI secure boot support.
-- 
2.31.1