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| Filename | Latest commit message | Latest commit date |
|---|---|---|
a7e0fb6c20
Currently the opal_exit tracepoint usually shows the opcode as 0:
<idle>-0 [047] d.h. 635.654292: opal_entry: opcode=63
<idle>-0 [047] d.h. 635.654296: opal_exit: opcode=0 retval=0
kopald-1209 [019] d... 636.420943: opal_entry: opcode=10
kopald-1209 [019] d... 636.420959: opal_exit: opcode=0 retval=0
This is because we incorrectly load the opcode into r0 before calling
__trace_opal_exit(), whereas it expects the opcode in r3 (first function
parameter). In fact we are leaving the retval in r3, so opcode and
retval will always show the same value.
Instead load the opcode into r3, resulting in:
<idle>-0 [040] d.h. 636.618625: opal_entry: opcode=63
<idle>-0 [040] d.h. 636.618627: opal_exit: opcode=63 retval=0
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.