Aout warring of RVCT22

Hi all,

We are using RVCT22 to compile symbian9.1.
We tried to compile our VARIANT. Fortunately, error was not occured, but a
lof of warring was occured.
We wonder whether this warrings are critical problem or not.
The following is a part of warring  messages.


make -r  -f
"\EPOC32\BUILD\src\cedar\generic\base\omap\variant\ARMV5.make"
TARGET CFG=UREL VERBOSE=-s
"..\..\E32\memmodel\epoc\moving\arm\xmmu.cpp", line 535: Warning: 
#68-D:
integer conversion resulted in a change of sign
   if(aAttPtr==SPageInfo::EInvalidAttPtr)


"..\..\e32\drivers\mednand\GBBM\flash.cpp", line 590: Warning: 
#186-D:
pointless comparison of unsigned integer with zero
   if (!IS_VALID_DEV(iFlDev)) {



Would you like to give me some info about this issue?

Thanks.
Inchul Lee.