Thomas Gleixner wrote: > On Thu, 19 Nov 2009, Andrew Haley wrote: >> Thomas Gleixner wrote: >>> There is no real obvious reason why the edi magic needs to be done >>> _before_ >>> >>> push %ebp >>> mov %esp,%ebp >> Sure there is: unless you do the adjustment first %ebp won't be 16-aligned. > > And why is this not done in 99% of the functions in the kernel, just > in this one and some random others ?
If I could see the function I might be able to tell you. It's either a performance enhancement, something to do with SSE, or it's a bug. Andrew.
