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| author | Russell King | 2009-06-06 23:47:11 +0200 |
|---|---|---|
| committer | Sam Ravnborg | 2009-06-09 22:37:57 +0200 |
| commit | eedc9d83eaab2d35fb9dd1ec25b765dec964e26c (patch) | |
| tree | 0ac52787334de2da7852f70a4d6822e6cb291a68 /include | |
| parent | kbuild/headers_check: refine extern check (diff) | |
| download | kernel-qcow2-linux-eedc9d83eaab2d35fb9dd1ec25b765dec964e26c.tar.gz kernel-qcow2-linux-eedc9d83eaab2d35fb9dd1ec25b765dec964e26c.tar.xz kernel-qcow2-linux-eedc9d83eaab2d35fb9dd1ec25b765dec964e26c.zip | |
kbuild: fix headers_exports with boolean expression
When we had code like this in a header unifdef failed to
deduct that the expression was always false - and we had code exported
that was not intended for userspace.
#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
int a;
#endif
This commit implment support in unidef which allows it to work out if
an #if expression always evaluates true or false for symbols which
are being undefined/always defined.
The patch is slightly more complicated than I'd hoped because unifdef
needs to see lines fully evaluated - doing otherwise causes it to
mark the line as "dirty" and copy it over no matter what.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions