Peter Zijlstra 9ae1e990f1 perf tools: Remove broken __no_tail_call attribute ...

The GCC specific __attribute__((optimize)) attribute does not what is
commonly expected and is explicitly recommended against using in
production code by the GCC people.

Unlike what is often expected, it doesn't add to the optimization flags,
but it fully replaces them, loosing any and all optimization flags
provided by the compiler commandline.

The only guaranteed upon means of inhibiting tail-calls is by placing a
volatile asm with side-effects after the call such that the tail-call simply
cannot be done.

Given the original commit wasn't specific on which calls were the problem, this
removal might re-introduce the problem, which can then be re-analyzed and cured
properly.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Arvind Sankar <nivedita@alum.mit.edu>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lore.kernel.org/lkml/20201028081123.GT2628@hirez.programming.kicks-ass.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2020-11-03 08:32:15 -03:00

..

sched

…

unaligned

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atomic.h

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bitmap.h

tools bitmap: Implement bitmap_equal() operation at bitmap API

2020-01-06 11:46:04 -03:00

bitops.h

bitops: more BITS_TO_* macros

2020-02-04 03:05:26 +00:00

bits.h

Raise gcc version requirement to 4.9

2020-07-08 10:48:35 -07:00

btf_ids.h

btf: Add BTF_ID_LIST_SINGLE macro

2020-09-21 15:00:40 -07:00

bug.h

…

build_bug.h

tools headers: Synchronize linux/bits.h with the kernel sources

2020-04-14 11:40:05 -03:00

compiler-gcc.h

perf tools: Remove broken __no_tail_call attribute

2020-11-03 08:32:15 -03:00

compiler.h

perf tools: Remove broken __no_tail_call attribute

2020-11-03 08:32:15 -03:00

const.h

tools headers: Update linux/vdso.h and grab a copy of vdso/const.h

2020-04-14 08:55:03 -03:00

coresight-pmu.h

coresight: etm4x: Add kernel configuration for CONTEXTID

2019-04-25 22:00:16 +02:00

ctype.h

tools perf: Move from sane_ctype.h obtained from git to the Linux's original

2019-06-25 21:02:47 -03:00

debug_locks.h

…

delay.h

…

err.h

docs: fix broken documentation links

2019-06-08 13:42:13 -06:00

export.h

…

filter.h

bpf, selftest: test {rd, wr}only flags and direct value access

2019-04-09 17:05:47 -07:00

ftrace.h

…

gfp.h

…

hardirq.h

…

hash.h

…

hashtable.h

…

interrupt.h

…

irqflags.h

lockdep: Remove lockdep_hardirq{s_enabled,_context}() argument

2020-07-10 12:00:02 +02:00

jhash.h

tools/: replace HTTP links with HTTPS ones

2020-08-07 11:33:21 -07:00

kallsyms.h

kallsyms/printk: add loglvl to print_ip_sym()

2020-06-09 09:39:10 -07:00

kern_levels.h

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kernel.h

tools headers: Synchronize linux/bits.h with the kernel sources

2020-04-14 11:40:05 -03:00

linkage.h

…

list.h

…

lockdep.h

tools/lib/lockdep: Add dummy task_struct state member

2018-09-10 13:48:24 +02:00

log2.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30 11:26:32 -07:00

module.h

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mutex.h

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nmi.h

tools/lib/lockdep: Add empty nmi.h

2018-09-10 13:48:23 +02:00

numa.h

tools/: replace open encodings for NUMA_NO_NODE

2019-03-05 21:07:14 -08:00

objtool.h

treewide: Convert macro and uses of __section(foo) to __section("foo")

2020-10-25 14:51:49 -07:00

overflow.h

tools: bpf: make use of reallocarray

2018-07-11 22:13:34 +02:00

poison.h

Drop flex_arrays

2019-03-12 10:04:03 -07:00

proc_fs.h

…

rbtree_augmented.h

docs: Add rbtree documentation to the core-api

2020-04-21 10:29:19 -06:00

rbtree.h

docs: Add rbtree documentation to the core-api

2020-04-21 10:29:19 -06:00

rcu.h

rcu: Don't return a value from rcu_assign_pointer()

2019-06-13 15:38:34 -07:00

refcount.h

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ring_buffer.h

tools headers: Add missing perf_event.h include

2019-08-22 11:12:36 -03:00

seq_file.h

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sizes.h

tools: bpftool: add "prog run" subcommand to test-run programs

2019-07-05 23:48:07 +02:00

spinlock.h

xarray: Add XArray unconditional store operations

2018-10-21 10:45:57 -04:00

stacktrace.h

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static_call_types.h

static_call: Handle tail-calls

2020-09-01 09:58:06 +02:00

string.h

tools lib: Fix builds when glibc contains strlcpy()

2020-01-06 11:46:10 -03:00

stringify.h

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time64.h

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types.h

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zalloc.h

tools lib: Adopt zalloc()/zfree() from tools/perf

2019-07-09 10:13:26 -03:00