[U-Boot] [PATCH] ppc: mpc8323erdb: Fix compiler warning

Wolfgang Denk wd at denx.de
Sun Jul 14 19:43:48 CEST 2013


Dear Marek Vasut,

In message <1373710940-15779-1-git-send-email-marex at denx.de> you wrote:
> Fix the following warning:
> 
> mpc8323erdb.c: In function 'mac_read_from_eeprom':
> mpc8323erdb.c:198:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
>    if (crc32(crc, buf, 24) == *(unsigned int *)&buf[24]) {
>    ^
> 
> Size remains unchanged after and before fix:
> 
>    text    data     bss     dec     hex filename
>  206977   18748   23344  249069   3cced ./u-boot
> 
> Note the fix is the crudest possible, but also least intrusive.

Please see Timur's review comments to my original patch for this
isssue ([1]). The "unsigned int" should indeed be fixed.

I resubmitted a v2 with the review comments incorporated on July 08,
see [2], but I caught only one part of the needed changes.  V3 sent
right now; see [3].  I'd rather see this added than yours.

Also note that it might be a good idea to add the MPC83xx custodion to
the Cc: list of such patches...


[1] http://article.gmane.org/gmane.comp.boot-loaders.u-boot/163386
[2] http://article.gmane.org/gmane.comp.boot-loaders.u-boot/165266
[3] http://article.gmane.org/gmane.comp.boot-loaders.u-boot/165731


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
You got to learn three things. What's  real,  what's  not  real,  and
what's the difference."           - Terry Pratchett, _Witches Abroad_


More information about the U-Boot mailing list