gatekeeper: more preparation for Ubuntu 24.04 LTS #693
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This commit avoids the following compilation warning:
lib/rib.c: In function ‘rib_create’:
lib/rib.c:125:15: warning: ‘dummy’ may be used uninitialized [-Wmaybe-uninitialized]
125 | ret = __read_addr(max_length, &dummy, (const uint8_t *)&dummy);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/rib.c:30:1: note: by argument 3 of type ‘const uint8_t *’ {aka ‘const unsigned char *’} to ‘__read_addr’ declared here
30 | __read_addr(uint8_t length, rib_address_t *cpu_addr, const uint8_t *address)
| ^~~~~~~~~~~
lib/rib.c:109:23: note: ‘dummy’ declared here
109 | rib_address_t dummy;
| ^~~~~
Not only does gettid() require #define _GNU_SOURCE, but it has also presented header problems in different versions of Lib C. So this commit eases the effort to compile Gatekeeper on different distros. A small benefit gained from using rte_gettid() is that it caches the thread ID in a per-thread variable to avoid subsequent system calls.
This commit centralizes all RSS fields that need to be set in check_if_rss().
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