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| author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2020-09-22 12:48:25 +0200 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2020-09-22 17:58:11 +0200 |
| commit | 89de370eddb61949fb3c87abbe544c217079479e (patch) | |
| tree | 7f6fcedc2489d1fec158ce140e02445a3a4a154f /src/activate | |
| parent | 06ca077ba2768a985a5f34926dcf7fe0c148a8f1 (diff) | |
| download | systemd-89de370eddb61949fb3c87abbe544c217079479e.tar.gz | |
core/namespace: drop bitfield annotations from boolean fields
Such microoptimization makes sense when the structure is used in many many copies,
but here's it's not, and the few bytes we save are not worth the extra code the
compiler has to generate:
return ns_info->mount_apivfs ||
ns_info->protect_control_groups ||
ns_info->protect_kernel_tunables ||
...
before:
49b187: 48 8b 45 f8 mov -0x8(%rbp),%rax
49b18b: 0f b6 00 movzbl (%rax),%eax
49b18e: 83 e0 80 and $0xffffff80,%eax
49b191: 84 c0 test %al,%al
49b193: 75 32 jne 49b1c7 <namespace_info_mount_apivfs+0x80>
49b195: 48 8b 45 f8 mov -0x8(%rbp),%rax
49b199: 0f b6 00 movzbl (%rax),%eax
49b19c: 83 e0 08 and $0x8,%eax
49b19f: 84 c0 test %al,%al
49b1a1: 75 24 jne 49b1c7 <namespace_info_mount_apivfs+0x80>
49b1a3: 48 8b 45 f8 mov -0x8(%rbp),%rax
49b1a7: 0f b6 00 movzbl (%rax),%eax
49b1aa: 83 e0 10 and $0x10,%eax
49b1ad: 84 c0 test %al,%al
49b1af: 75 16 jne 49b1c7 <namespace_info_mount_apivfs+0x80>
after:
49b024: 48 8b 45 f8 mov -0x8(%rbp),%rax
49b028: 0f b6 40 07 movzbl 0x7(%rax),%eax
49b02c: 84 c0 test %al,%al
49b02e: 75 2e jne 49b05e <namespace_info_mount_apivfs+0x7a>
49b030: 48 8b 45 f8 mov -0x8(%rbp),%rax
49b034: 0f b6 40 03 movzbl 0x3(%rax),%eax
49b038: 84 c0 test %al,%al
49b03a: 75 22 jne 49b05e <namespace_info_mount_apivfs+0x7a>
49b03c: 48 8b 45 f8 mov -0x8(%rbp),%rax
49b040: 0f b6 40 04 movzbl 0x4(%rax),%eax
49b044: 84 c0 test %al,%al
49b046: 75 16 jne 49b05e <namespace_info_mount_apivfs+0x7a>
Diffstat (limited to 'src/activate')
0 files changed, 0 insertions, 0 deletions