mirror of https://gitee.com/openkylin/linux.git
5bf8e6096c
According to the struct net_device_ops documentation .ndo_start_xmit is "Required; cannot be NULL.". Missing it may crash kernel easily: [ 341.216709] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 341.224836] pgd = 26088755 [ 341.227544] [00000000] *pgd=00000000 [ 341.231135] Internal error: Oops: 80000007 [#1] SMP ARM [ 341.236367] Modules linked in: pppoe ppp_async iptable_nat brcmfmac xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQU [ 341.304689] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.24 #0 [ 341.310621] Hardware name: BCM5301X [ 341.314116] PC is at 0x0 [ 341.316664] LR is at dev_hard_start_xmit+0x8c/0x11c [ 341.321546] pc : [<00000000>] lr : [<c0469fa8>] psr: 60000113 [ 341.327821] sp : c0801c30 ip : c610cf00 fp : c08048e4 [ 341.333051] r10: c073a63a r9 : c08044dc r8 : c6c04e00 [ 341.338283] r7 : 00000000 r6 : c60f5000 r5 : 00000000 r4 : c6a9c3c0 [ 341.344820] r3 : 00000000 r2 : bf25a13c r1 : c60f5000 r0 : c6a9c3c0 [ 341.351358] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 341.358504] Control: 10c5387d Table: 0611c04a DAC: 00000051 [ 341.364257] Process swapper/0 (pid: 0, stack limit = 0xc68ed0ca) [ 341.370271] Stack: (0xc0801c30 to 0xc0802000) [ 341.374633] 1c20: c6e7d480 c0802d00 c60f5050 c0801c6c [ 341.382825] 1c40: c60f5000 c6a9c3c0 c6f90000 c6f9005c c6c04e00 c60f5000 00000000 c6f9005c [ 341.391015] 1c60: 00000000 c04a033c 00f90200 00000010 c6a9c3c0 c6a9c3c0 c6f90000 00000000 [ 341.399205] 1c80: 00000000 00000000 00000000 c046a7ac c6f9005c 00000001 fffffff4 00000000 [ 341.407395] 1ca0: c6f90200 00000000 c60f5000 c0479550 00000000 c6f90200 c6a9c3c0 16000000 [ 341.415586] 1cc0: 0000001c 6f4ad52f c6197040 b6df9387 36000000 c0520404 c073a80c c6a9c3c0 [ 341.423777] 1ce0: 00000000 c6d643c0 c6a9c3c0 c0800024 00000001 00000001 c6d643c8 c6a9c3c0 [ 341.431967] 1d00: c081b9c0 c7abca80 c610c840 c081b9c0 0000001c 00400000 c6bc5e6c c0522fb4 [ 341.440157] 1d20: c6d64400 00000004 c6bc5e0a 00000000 c60f5000 c7abca80 c081b9c0 c0522f54 [ 341.448348] 1d40: c6a9c3c0 c7abca80 c0803e48 c0549c94 c610c828 0000000a c0801d74 00000003 [ 341.456538] 1d60: c6ec8f0a 00000000 c60f5000 c7abca80 c081b9c0 c0548520 0000000a 00000000 [ 341.464728] 1d80: 00000000 003a0000 00000000 00000000 00000000 00000000 00000000 00000000 [ 341.472919] 1da0: 000002ff 00000000 00000000 16000000 00000000 00000000 00000000 00000000 [ 341.481110] 1dc0: 00000000 |
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|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.