Re: [PATCH V2 3/6] x86_32/sysenter: switch to the task stack without emptying the entry stack

On Mon, Jan 25, 2021 at 11:35 AM Lai Jiangshan wrote: > > From: Lai Jiangshan > > Like the way x86_64 uses the "old" stack, we can save the entry stack > pointer to a register and switch to the task stack. So that we have > space on the "old" stack to save more things or scratch registers. > > S

[PATCH V2 3/6] x86_32/sysenter: switch to the task stack without emptying the entry stack

From: Lai Jiangshan Like the way x86_64 uses the "old" stack, we can save the entry stack pointer to a register and switch to the task stack. So that we have space on the "old" stack to save more things or scratch registers. Signed-off-by: Lai Jiangshan --- arch/x86/entry/entry_32.S | 11