Re: Kernel symbol version history
From: Grant Likely <hidden>
Date: 2007-12-05 16:49:36
On 12/5/07, David H. Lynch Jr. [off-list ref] wrote:
This might be slightly OT here, but would anyone know where there
might be a reference that indicates at precisely what version a given
symbol either appeared or disappeared within the Linux kernel ?
As an example if a driver is supposed to work for 2.6 and 2.4 and
uses sysfs, or cdev, or alloc_chr_dev_region or ...
How can one tell at what point that api or symbol appeared so that
the proper conditionals appear within the driver.the 'gitk' tool allows you to search for the addition or removal of a string. You
The last one that bit me was I made a collection of casting changes
to address 64bit vs. 32bit targets, and found that using the C99 fixed
size types - uint32_t, ... made life much more pleasant, after putting
them I nobody else could build because uintptr_t did not appear until
2.6.24, and I still have not figured out exactly when uint32_t etc.
appeared.
I would think there ought to be some resource besides group memory
to look this up ?
Is there a way to use git to look back through the history of a
symbol rather than a file.grant@trillian:~/hacking/linux-2.6$ grep "uint32_t" include/* -r | grep typedef include/linux/types.h:typedef __u32 uint32_t; grant@trillian:~/hacking/linux-2.6$ git log -p include/linux/types.h | vim - (Search for the string uint32_t) Looks like it was there before Linus started using git.
-- Dave Lynch DLA Systems Software Development: Embedded Linux 717.627.3770 dhlii@dlasys.net http://www.dlasys.net fax: 1.253.369.9244 Cell: 1.717.587.7774 Over 25 years' experience in platforms, languages, and technologies too numerous to list. "Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction." Albert Einstein _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
-- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. grant.likely@secretlab.ca (403) 399-0195