I just posted this to the mailing list, but I’ve tagged skiboot-4.1, so we have another release! There’s a good amount of changes since 4.0 nearly a month ago and this is the second release since we hit github back in July.

For the full set of changes, “git log” is your friend, but a summary of them follows:

• We now build with -fstack-protector and -Werror
• Stack checking extensions when built with STACK_CHECK=1
• Reduced stack usage in some areas, -Wstack-usage=1024 now.
  • Some functions could use 2kb stack, now all are <1kb
• Unsafe libc functions such as sprintf() have been removed
• Symbolic backtraces
• expose skiboot symbol map to OS (via device-tree)
• removed machine check interrupt patching in OPAL
• occ/hbrt: Call stopOCC() for implementing reset OCC command from FSP
• occ: Fix the low level ACK message sent to FSP on receiving {RESET/LOAD}_OCC
• hardening to errors of various FSP code
  • fsp: Avoid NULL dereference in case of invalid class_resp bits
  • abort if device tree parsing fails
  • FSP: Validate fsp_msg in fsp_queue_msg
  • fsp-elog: Add various NULL checks
• Finessing of when to use error log vs prerror()
• More i2c work
• Can now run under Mambo simulator (see external/mambo/skiboot.tcl) (commonly known as “POWER8 Functional Simulator”)
• Document skiboot versioning scheme
• opal: Handle more TFAC errors.
  • TB_RESIDUE_ERR, FW_CONTROL_ERR and CHIP_TOD_PARITY_ERR
• ipmi: populate FRU data
• rtc: Add a generic rtc cache
• ipmi/rtc: use generic cache
• Error Logging backend for bmc based machines
• PSI: Drive link down on HIR
• occ: Fix clearing of OCC interrupt on remote fix

So, who worked on this release? We had 84 csets from 17 developers. A total of 3271 lines were added, 1314 removed (delta 1957).