mirror of https://github.com/torvalds/linux.git
857f451796
The custom swap function used in sort() was identical to the default built-in sort swap. Remove the custom swap function and passes NULL to sort(), allowing it to use the default swap function. This change reduces code size and improves performance, particularly when CONFIG_MITIGATION_RETPOLINE is enabled. With RETPOLINE mitigation, indirect function calls incur significant overhead, and using the default swap function avoids this cost. $ ./scripts/bloat-o-meter ./unwind.o.old ./unwind.o.new add/remove: 0/1 grow/shrink: 0/1 up/down: 0/-22 (-22) Function old new delta init_unwind_hdr.constprop 544 540 -4 swap_eh_frame_hdr_table_entries 18 - -18 Total: Before=4410, After=4388, chg -0.50% Signed-off-by: Yu-Chun Lin <eleanor15x@gmail.com> Signed-off-by: Vineet Gupta <vgupta@kernel.org> |
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| .. | ||
| .gitignore | ||
| Makefile | ||
| Makefile.syscalls | ||
| arc_hostlink.c | ||
| arcksyms.c | ||
| asm-offsets.c | ||
| ctx_sw_asm.S | ||
| devtree.c | ||
| disasm.c | ||
| entry-arcv2.S | ||
| entry-compact.S | ||
| entry.S | ||
| fpu.c | ||
| head.S | ||
| intc-arcv2.c | ||
| intc-compact.c | ||
| irq.c | ||
| jump_label.c | ||
| kgdb.c | ||
| kprobes.c | ||
| mcip.c | ||
| module.c | ||
| perf_event.c | ||
| process.c | ||
| ptrace.c | ||
| reset.c | ||
| setup.c | ||
| signal.c | ||
| smp.c | ||
| stacktrace.c | ||
| sys.c | ||
| traps.c | ||
| troubleshoot.c | ||
| unaligned.c | ||
| unaligned.h | ||
| unwind.c | ||
| vmlinux.lds.S | ||