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author | Andreas Gruenbacher <agruen@suse.de> | 2008-12-01 23:21:01 +0100 |
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committer | Sam Ravnborg <sam@ravnborg.org> | 2008-12-03 22:33:11 +0100 |
commit | 64e6c1e12372840e7caf8e25325a9e9c5fd370e6 (patch) | |
tree | aa47aa4e170dd4bb39c99cc7356231e2c61d64d2 /scripts/genksyms/genksyms.h | |
parent | tags and cscope support really belongs in a shell script (diff) | |
download | linux-64e6c1e12372840e7caf8e25325a9e9c5fd370e6.tar.xz linux-64e6c1e12372840e7caf8e25325a9e9c5fd370e6.zip |
genksyms: track symbol checksum changes
Sometimes it is preferable to avoid changes of exported symbol checksums
(to avoid breaking externally provided modules). When a checksum change
occurs, it can be hard to figure out what caused this change: underlying
types may have changed, or additional type information may simply have
become available at the point where a symbol is exported.
Add a new --reference option to genksyms which allows it to report why
checksums change, based on the type information dumps it creates with the
--dump-types flag. Genksyms will read in such a dump from a previous run,
and report which symbols have changed (and why).
The behavior can be controlled for an entire build as follows: If
KBUILD_SYMTYPES is set, genksyms uses --dump-types to produce *.symtypes
dump files. If any *.symref files exist, those will be used as the
reference to check against. If KBUILD_PRESERVE is set, checksum changes
will fail the build.
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'scripts/genksyms/genksyms.h')
-rw-r--r-- | scripts/genksyms/genksyms.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/scripts/genksyms/genksyms.h b/scripts/genksyms/genksyms.h index 2668287aa498..2831158426cd 100644 --- a/scripts/genksyms/genksyms.h +++ b/scripts/genksyms/genksyms.h @@ -29,6 +29,10 @@ enum symbol_type { SYM_NORMAL, SYM_TYPEDEF, SYM_ENUM, SYM_STRUCT, SYM_UNION }; +enum symbol_status { + STATUS_UNCHANGED, STATUS_DEFINED, STATUS_MODIFIED +}; + struct string_list { struct string_list *next; enum symbol_type tag; @@ -43,6 +47,8 @@ struct symbol { struct symbol *expansion_trail; struct symbol *visited; int is_extern; + int is_declared; + enum symbol_status status; }; typedef struct string_list **yystype; |