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82a1978d0f
The 'cpio' command is used solely for copying header files to the
temporary directory. However, there is no strong reason to use 'cpio'
for this purpose. For example, scripts/package/install-extmod-build
uses the 'tar' command to copy files.
This commit replaces the use of 'cpio' with 'tar' because 'tar' is
already used in this script to generate kheaders_data.tar.xz anyway.
Performance-wide, there is no significant difference between 'cpio'
and 'tar'.
[Before]
$ rm -fr kheaders; mkdir kheaders
$ time sh -c '
for f in include arch/x86/include
do
find "$f" -name "*.h"
done | cpio --quiet -pd kheaders
'
real 0m0.148s
user 0m0.021s
sys 0m0.140s
[After]
$ rm -fr kheaders; mkdir kheaders
$ time sh -c '
for f in include arch/x86/include
do
find "$f" -name "*.h"
done | tar -c -f - -T - | tar -xf - -C kheaders
'
real 0m0.098s
user 0m0.024s
sys 0m0.131s
Revert commit
|
||
|---|---|---|
| .. | ||
| ABI | ||
| accel | ||
| accounting | ||
| admin-guide | ||
| arch | ||
| block | ||
| bpf | ||
| cdrom | ||
| core-api | ||
| cpu-freq | ||
| crypto | ||
| dev-tools | ||
| devicetree | ||
| doc-guide | ||
| driver-api | ||
| fault-injection | ||
| fb | ||
| features | ||
| filesystems | ||
| firmware_class | ||
| firmware-guide | ||
| fpga | ||
| gpu | ||
| hid | ||
| hwmon | ||
| i2c | ||
| iio | ||
| images | ||
| infiniband | ||
| input | ||
| isdn | ||
| kbuild | ||
| kernel-hacking | ||
| leds | ||
| litmus-tests | ||
| livepatch | ||
| locking | ||
| maintainer | ||
| mhi | ||
| misc-devices | ||
| mm | ||
| netlabel | ||
| netlink | ||
| networking | ||
| nvdimm | ||
| nvme | ||
| PCI | ||
| pcmcia | ||
| peci | ||
| power | ||
| process | ||
| RCU | ||
| rust | ||
| scheduler | ||
| scsi | ||
| security | ||
| sound | ||
| sphinx | ||
| sphinx-static | ||
| spi | ||
| staging | ||
| target | ||
| tee | ||
| timers | ||
| tools | ||
| trace | ||
| translations | ||
| usb | ||
| userspace-api | ||
| virt | ||
| w1 | ||
| watchdog | ||
| wmi | ||
| .gitignore | ||
| atomic_bitops.txt | ||
| atomic_t.txt | ||
| Changes | ||
| CodingStyle | ||
| conf.py | ||
| docutils.conf | ||
| index.rst | ||
| Kconfig | ||
| Makefile | ||
| memory-barriers.txt | ||
| SubmittingPatches | ||
| subsystem-apis.rst | ||