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9ae1e990f1
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> |
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| .. | ||
| sched | ||
| unaligned | ||
| atomic.h | ||
| bitmap.h | ||
| bitops.h | ||
| bits.h | ||
| btf_ids.h | ||
| bug.h | ||
| build_bug.h | ||
| compiler-gcc.h | ||
| compiler.h | ||
| const.h | ||
| coresight-pmu.h | ||
| ctype.h | ||
| debug_locks.h | ||
| delay.h | ||
| err.h | ||
| export.h | ||
| filter.h | ||
| ftrace.h | ||
| gfp.h | ||
| hardirq.h | ||
| hash.h | ||
| hashtable.h | ||
| interrupt.h | ||
| irqflags.h | ||
| jhash.h | ||
| kallsyms.h | ||
| kern_levels.h | ||
| kernel.h | ||
| linkage.h | ||
| list.h | ||
| lockdep.h | ||
| log2.h | ||
| module.h | ||
| mutex.h | ||
| nmi.h | ||
| numa.h | ||
| objtool.h | ||
| overflow.h | ||
| poison.h | ||
| proc_fs.h | ||
| rbtree.h | ||
| rbtree_augmented.h | ||
| rcu.h | ||
| refcount.h | ||
| ring_buffer.h | ||
| seq_file.h | ||
| sizes.h | ||
| spinlock.h | ||
| stacktrace.h | ||
| static_call_types.h | ||
| string.h | ||
| stringify.h | ||
| time64.h | ||
| types.h | ||
| zalloc.h | ||