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Commit 1c4c6597 authored by John David Anglin's avatar John David Anglin Committed by Helge Deller
Browse files

parisc: Fix comment describing setup of access rights in entry.S 



This comment describes incredibly subtle code, so it should be right!

Signed-off-by: default avatarJohn David Anglin <dave.anglin@bell.net>
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 0e39718b

arch/parisc/kernel/entry.S

+2 −2
Original line number Diff line number Diff line
@@ -483,7 +483,7 @@ 
	 * B <-> _PAGE_DMB (memory break)

	 *

	 * Then incredible subtlety: The access rights are

	 * _PAGE_GATEWAY _PAGE_EXEC _PAGE_READ

	 * _PAGE_GATEWAY, _PAGE_EXEC and _PAGE_WRITE

	 * See 3-14 of the parisc 2.0 manual

	 *

	 * Finally, _PAGE_READ goes in the top bit of PL1 (so we
@@ -493,7 +493,7 @@ 


	/* PAGE_USER indicates the page can be read with user privileges,

	 * so deposit X1|11 to PL1|PL2 (remember the upper bit of PL1

	 * contains _PAGE_READ */

	 * contains _PAGE_READ) */

	extrd,u,*=      \pte,_PAGE_USER_BIT+32,1,%r0

	depdi		7,11,3,\prot

	/* If we're a gateway page, drop PL2 back to zero for promotion