mirror of
https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-21 04:00:01 -04:00
| Filename | Latest commit message | Latest commit date |
|---|---|---|
ee91ef6173
With both gcc 4.7.2 and 4.9.2, sometimes gcc mysteriously doesn't inline
very small functions we expect to be inlined. See
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66122
With this .config:
http://busybox.net/~vda/kernel_config_OPTIMIZE_INLINING_and_Os,
set_buffer_foo(), clear_buffer_foo() and similar functions get deinlined
about 60 times. Examples of disassembly:
<set_buffer_mapped> (14 copies, 43 calls):
55 push %rbp
48 89 e5 mov %rsp,%rbp
f0 80 0f 20 lock orb $0x20,(%rdi)
5d pop %rbp
c3 retq
<buffer_mapped> (3 copies, 34 calls):
48 8b 07 mov (%rdi),%rax
55 push %rbp
48 89 e5 mov %rsp,%rbp
48 c1 e8 05 shr $0x5,%rax
83 e0 01 and $0x1,%eax
5d pop %rbp
c3 retq
<set_buffer_new> (5 copies, 13 calls):
55 push %rbp
48 89 e5 mov %rsp,%rbp
f0 80 0f 40 lock orb $0x40,(%rdi)
5d pop %rbp
c3 retq
This patch fixes this via s/inline/__always_inline/.
This decreases vmlinux by about 3 kbytes.
text data bss dec hex filename
88200439 19905208 36421632 144527279 89d4faf vmlinux2
88197239 19905240 36421632 144524111 89d434f vmlinux
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
||
| .. | ||
| acpi | ||
| asm-generic | ||
| clocksource | ||
| crypto | ||
| drm | ||
| dt-bindings | ||
| keys | ||
| kvm | ||
| linux | ||
| math-emu | ||
| media | ||
| memory | ||
| misc | ||
| net | ||
| pcmcia | ||
| ras | ||
| rdma | ||
| rxrpc | ||
| scsi | ||
| soc | ||
| sound | ||
| target | ||
| trace | ||
| uapi | ||
| video | ||
| xen | ||
| Kbuild | ||