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Commit 80c5ff6b authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Fix _interrupt function 



Save instructions by using delay slot and
clear UMS only if kernel comes from user space.

Signed-off-by: default avatarMichal Simek <monstr@monstr.eu>
parent 25f6e596

arch/microblaze/kernel/entry.S

+3 −5
Original line number Diff line number Diff line
@@ -747,15 +747,13 @@ C_ENTRY(_interrupt): 
	swi	r0, r1, PTO + PT_MODE;

	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));

	swi	r11, r1, PTO+PT_R1;

	clear_ums;

2:

	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));

	tovirt(r1,r1)

	addik	r5, r1, PTO;

	set_vms;

	addik	r11, r0, do_IRQ;

	addik	r15, r0, irq_call;

irq_call:rtbd	r11, 0;

	nop;

irq_call:rtbd	r0, do_IRQ;

	addik	r5, r1, PTO;



/* MS: we are in virtual mode */

ret_from_irq: