elf: Remove LD_HWCAP_MASK / tunable glibc.cpu.hwcap_mask

Remove the environment variable LD_HWCAP_MASK and the tunable
glibc.cpu.hwcap_mask as those are not used anymore in common-code
after removal in elf/dl-cache.c:search_cache().

The only remaining user is sparc32 where it is used in
elf_machine_matches_host().  If sparc32 does not need it anymore,
we can get rid of it at all.  Otherwise we could also move
LD_HWCAP_MASK / tunable glibc.cpu.hwcap_mask to be sparc32 specific.
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 0 insertions, 11 deletions

diff --git a/manual/tunables.texi b/manual/tunables.texi
index 8dd02d8149..0b1b2898c0 100644
--- a/manual/tunables.texi
+++ b/manual/tunables.texi
@@ -55,7 +55,6 @@ glibc.cpu.x86_non_temporal_threshold: 0xc0000 (min: 0x4040, max: 0xfffffffffffff
 glibc.cpu.x86_memset_non_temporal_threshold: 0xc0000 (min: 0x4040, max: 0xfffffffffffffff)
 glibc.cpu.x86_shstk:
 glibc.pthread.stack_cache_size: 0x2800000 (min: 0x0, max: 0xffffffffffffffff)
-glibc.cpu.hwcap_mask: 0x6 (min: 0x0, max: 0xffffffffffffffff)
 glibc.malloc.mmap_max: 0 (min: 0, max: 2147483647)
 glibc.elision.skip_trylock_internal_abort: 3 (min: 0, max: 2147483647)
 glibc.cpu.plt_rewrite: 0 (min: 0, max: 2)
@@ -504,16 +503,6 @@ Behavior of @theglibc{} can be tuned to assume specific hardware capabilities
 by setting the following tunables in the @code{cpu} namespace:
 @end deftp
 
-@deftp Tunable glibc.cpu.hwcap_mask
-This tunable supersedes the @env{LD_HWCAP_MASK} environment variable and is
-identical in features.
-
-The @code{AT_HWCAP} key in the Auxiliary Vector specifies instruction set
-extensions available in the processor at runtime for some architectures.  The
-@code{glibc.cpu.hwcap_mask} tunable allows the user to mask out those
-capabilities at runtime, thus disabling use of those extensions.
-@end deftp
-
 @deftp Tunable glibc.cpu.hwcaps
 The @code{glibc.cpu.hwcaps=-xxx,yyy,-zzz...} tunable allows the user to
 enable CPU/ARCH feature @code{yyy}, disable CPU/ARCH feature @code{xxx}