Arnd Bergmann 778aaefb8e asm-generic: unaligned always use struct helpers ... As found by Vineet Gupta and Linus Torvalds, gcc has somewhat unexpected behavior when faced with overlapping unaligned pointers. The kernel's unaligned/access-ok.h header technically invokes undefined behavior that happens to usually work on the architectures using it, but if the compiler optimizes code based on the assumption that undefined behavior doesn't happen, it can create output that actually causes data corruption. A related problem was previously found on 32-bit ARMv7, where most instructions can be used on unaligned data, but 64-bit ldrd/strd causes an exception. The workaround was to always use the unaligned/le_struct.h helper instead of unaligned/access-ok.h, in commit 1cce91dfc8 ("ARM: 8715/1: add a private asm/unaligned.h"). The same solution should work on all other architectures as well, so remove the access-ok.h variant and use the other one unconditionally on all architectures, picking either the big-endian or little-endian version. With this, the arm specific header can be removed as well, and the only file including linux/unaligned/access_ok.h gets moved to including the normal file. Fortunately, this made almost no difference to the object code produced by gcc-11. On x86, s390, powerpc, and arc, the resulting binary appears to be identical to the previous version, while on arm64 and m68k there are minimal differences that looks like an optimization pass went into a different direction, usually using fewer stack spills on the new version. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100363		2021-05-10 17:50:47 +02:00
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.gitignore	crypto: mips: add poly1305-core.S to .gitignore	2021-03-29 11:19:10 +02:00
chacha-core.S	crypto: mips/chacha - wire up accelerated 32r2 code from Zinc	2019-11-17 09:02:40 +08:00
chacha-glue.c	crypto: arch - conditionalize crypto api in arch glue for lib code	2019-11-27 13:08:49 +08:00
crc32-mips.c	asm-generic: unaligned always use struct helpers	2021-05-10 17:50:47 +02:00
Makefile	crypto: mips/poly1305 - enable for all MIPS processors	2021-03-08 11:52:17 +01:00
poly1305-glue.c	crypto: poly1305 - fix poly1305_core_setkey() declaration	2021-04-02 18:28:12 +11:00
poly1305-mips.pl	crypto: mips/poly1305 - incorporate OpenSSL/CRYPTOGAMS optimized implementation	2019-11-17 09:02:42 +08:00