Add submodule dependency filesHEADmaster

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diff --git a/roms/skiboot/doc/release-notes/skiboot-4.1.rst b/roms/skiboot/doc/release-notes/skiboot-4.1.rst
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+.. _skiboot-4.1:
+
+===========
+skiboot 4.1
+===========
+
+Skiboot 4.1 was released 10th December 2014. It was a release where more
+development transitioned to the open source mailing list rather than internal
+mailing lists.
+
+Changes include:
+
+ - 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