> -----Original Message----- > And then KY Srinivasan spoke on Friday, February 11, 2011 12:56 PM > > From: Greg KH [mailto:gregkh@xxxxxxx] > > Sent: Friday, February 11, 2011 1:30 PM > > > - virtaddr = osd_virtual_alloc_exec(PAGE_SIZE); > > > +#ifdef __x86_64__ > > > + virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, > PAGE_KERNEL_EXEC); > > #else > > > + virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, > > > + __pgprot(__PAGE_KERNEL & (~_PAGE_NX))); #endif > > > > I'm not saying this patch is wrong at all, but I still don't > > understand why this is different depending on the architecture of the > > machine. Why is this necessary, it should be ok to do the same type > > of allocation no matter what the processor is, right? > > You are right Greg; I don't think there is a need to specify different page > protection bits based on the architecture - PAGE_KERNEL_EXEC should be > enough. > However, this is the code that is currently in the tree - refer to osd.c. > If it is ok with you, I could submit an additional patch to clean this up. > I seem to recall that we did it for very old versions of Linux (pre 2.6.18) But I cannot for the life of me remember why. Hank. _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
