linux/arch/arm/crypto
Masahiro Yamada 54a702f705 kbuild: mark $(targets) as .SECONDARY and remove .PRECIOUS markers
GNU Make automatically deletes intermediate files that are updated
in a chain of pattern rules.

Example 1) %.dtb.o <- %.dtb.S <- %.dtb <- %.dts
Example 2) %.o <- %.c <- %.c_shipped

A couple of makefiles mark such targets as .PRECIOUS to prevent Make
from deleting them, but the correct way is to use .SECONDARY.

  .SECONDARY
    Prerequisites of this special target are treated as intermediate
    files but are never automatically deleted.

  .PRECIOUS
    When make is interrupted during execution, it may delete the target
    file it is updating if the file was modified since make started.
    If you mark the file as precious, make will never delete the file
    if interrupted.

Both can avoid deletion of intermediate files, but the difference is
the behavior when Make is interrupted; .SECONDARY deletes the target,
but .PRECIOUS does not.

The use of .PRECIOUS is relatively rare since we do not want to keep
partially constructed (possibly corrupted) targets.

Another difference is that .PRECIOUS works with pattern rules whereas
.SECONDARY does not.

  .PRECIOUS: $(obj)/%.lex.c

works, but

  .SECONDARY: $(obj)/%.lex.c

has no effect.  However, for the reason above, I do not want to use
.PRECIOUS which could cause obscure build breakage.

The targets specified as .SECONDARY must be explicit.  $(targets)
contains all targets that need to include .*.cmd files.  So, the
intermediates you want to keep are mostly in there.  Therefore, mark
$(targets) as .SECONDARY.  It means primary targets are also marked
as .SECONDARY, but I do not see any drawback for this.

I replaced some .SECONDARY / .PRECIOUS markers with 'targets'.  This
will make Kbuild search for non-existing .*.cmd files, but this is
not a noticeable performance issue.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Frank Rowand <frowand.list@gmail.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
2018-04-07 19:04:02 +09:00
..
.gitignore crypto: arm - ignore generated SHA2 assembly files 2015-07-06 16:32:03 +08:00
Kconfig crypto: arm/speck - add NEON-accelerated implementation of Speck-XTS 2018-02-22 22:16:55 +08:00
Makefile kbuild: mark $(targets) as .SECONDARY and remove .PRECIOUS markers 2018-04-07 19:04:02 +09:00
aes-ce-core.S crypto: arm/aes-ce - remove cra_alignmask 2017-02-03 18:16:16 +08:00
aes-ce-glue.c crypto: algapi - make crypto_xor() take separate dst and src arguments 2017-08-04 09:27:15 +08:00
aes-cipher-core.S crypto: arm/aes-cipher - move S-box to .rodata section 2018-02-22 22:16:19 +08:00
aes-cipher-glue.c crypto: arm/aes - replace scalar AES cipher 2017-01-13 00:26:50 +08:00
aes-neonbs-core.S crypto: arm/aes - don't use IV buffer to return final keystream block 2017-02-03 18:16:21 +08:00
aes-neonbs-glue.c crypto: arm/aes-neonbs - Use PTR_ERR_OR_ZERO() 2017-12-11 22:36:56 +11:00
chacha20-neon-core.S crypto: arm/chacha20 - implement NEON version based on SSE3 code 2017-01-13 00:26:48 +08:00
chacha20-neon-glue.c crypto: arm/chacha20 - remove cra_alignmask 2017-02-03 18:16:19 +08:00
crc32-ce-core.S crypto: arm/crc32 - fix build error with outdated binutils 2017-03-01 19:47:51 +08:00
crc32-ce-glue.c crypto: hash - annotate algorithms taking optional key 2018-01-12 23:03:35 +11:00
crct10dif-ce-core.S crypto: arm/crct10dif - port x86 SSE implementation to ARM 2016-12-07 20:01:21 +08:00
crct10dif-ce-glue.c crypto: arm/crct10dif - port x86 SSE implementation to ARM 2016-12-07 20:01:21 +08:00
ghash-ce-core.S crypto: arm/ghash - add NEON accelerated fallback for vmull.p64 2017-08-04 09:27:24 +08:00
ghash-ce-glue.c crypto: arm/ghash - add NEON accelerated fallback for vmull.p64 2017-08-04 09:27:24 +08:00
sha1-armv4-large.S ARM: 7723/1: crypto: sha1-armv4-large.S: fix SP handling 2013-05-22 22:01:35 +01:00
sha1-armv7-neon.S crypto: arm/sha1-neon - add support for building in Thumb2 mode 2016-09-07 21:08:29 +08:00
sha1-ce-core.S crypto: arm/sha1-ce - move SHA-1 ARMv8 implementation to base layer 2015-04-10 21:39:44 +08:00
sha1-ce-glue.c crypto: arm/sha1-ce - enable module autoloading based on CPU feature bits 2017-06-01 12:55:40 +08:00
sha1.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sha1_glue.c crypto: arm/sha1 - move SHA-1 ARM asm implementation to base layer 2015-04-10 21:39:42 +08:00
sha1_neon_glue.c crypto: arm/sha1_neon - move SHA-1 NEON implementation to base layer 2015-04-10 21:39:43 +08:00
sha2-ce-core.S crypto: arm/sha2-ce - move SHA-224/256 ARMv8 implementation to base layer 2015-04-10 21:39:45 +08:00
sha2-ce-glue.c crypto: arm/sha2-ce - enable module autoloading based on CPU feature bits 2017-06-01 12:55:41 +08:00
sha256-armv4.pl crypto: arm/sha256 - Add optimized SHA-256/224 2015-04-03 18:03:40 +08:00
sha256-core.S_shipped crypto: arm/sha256 - Add optimized SHA-256/224 2015-04-03 18:03:40 +08:00
sha256_glue.c crypto: arm/sha256 - move SHA-224/256 ASM/NEON implementation to base layer 2015-04-10 21:39:44 +08:00
sha256_glue.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sha256_neon_glue.c crypto: arm/sha256 - move SHA-224/256 ASM/NEON implementation to base layer 2015-04-10 21:39:44 +08:00
sha512-armv4.pl crypto: arm/sha512 - accelerated SHA-512 using ARM generic ASM and NEON 2015-05-11 15:08:01 +08:00
sha512-core.S_shipped crypto: arm/sha512 - accelerated SHA-512 using ARM generic ASM and NEON 2015-05-11 15:08:01 +08:00
sha512-glue.c crypto: arm/sha512 - accelerated SHA-512 using ARM generic ASM and NEON 2015-05-11 15:08:01 +08:00
sha512-neon-glue.c crypto: arm/sha512 - accelerated SHA-512 using ARM generic ASM and NEON 2015-05-11 15:08:01 +08:00
sha512.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
speck-neon-core.S crypto: arm/speck - add NEON-accelerated implementation of Speck-XTS 2018-02-22 22:16:55 +08:00
speck-neon-glue.c crypto: arm/speck - add NEON-accelerated implementation of Speck-XTS 2018-02-22 22:16:55 +08:00