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.
Yoshihiro Shimoda
authored
If CONFIG_PTP_1588_CLOCK_OPTIONAL=m and CONFIG_RENESAS_ETHER_SWITCH=y,
the following build error happened:
aarch64-linux-ld: DWARF error: could not find abbrev number 60
drivers/net/ethernet/renesas/rswitch.o: in function `rswitch_get_ts_info':
rswitch.c:(.text+0x408): undefined reference to `ptp_clock_index'
aarch64-linux-ld: DWARF error: could not find abbrev number 1190123
drivers/net/ethernet/renesas/rcar_gen4_ptp.o: in function `rcar_gen4_ptp_register':
rcar_gen4_ptp.c:(.text+0x4dc): undefined reference to `ptp_clock_register'
aarch64-linux-ld: drivers/net/ethernet/renesas/rcar_gen4_ptp.o: in function `rcar_gen4_ptp_unregister':
rcar_gen4_ptp.c:(.text+0x584): undefined reference to `ptp_clock_unregister'
To fix the issue, add "depends on PTP_1588_CLOCK_OPTIONAL" into the
Kconfig.
Reported-by: 
kernel test robot <lkp@intel.com>
Suggested-by: 
Arnd Bergmann <arnd@arndb.de>
Fixes: 6c6fa1a0
("net: ethernet: renesas: rswitch: Add R-Car Gen4 gPTP support")
Signed-off-by: 
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20221110012720.3552060-1-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: 
Jakub Kicinski <kuba@kernel.org>