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parisc: Use LINUX_GATEWAY_SPACE constant in entry.S 

Use and mention the predefined LINUX_GATEWAY_SPACE constant in the
various important code sections which deal with the gateway page.

Signed-off-by: Helge Deller <deller@gmx.de>
hifive-unleashed-5.1
Helge Deller 2018-10-25 08:31:16 +02:00
parent 9a298b4455
commit 87613bb9d2
1 changed files with 3 additions and 2 deletions
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5
arch/parisc/kernel/entry.S
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@ -394,6 +394,7 @@
*/
.macro space_check spc,tmp,fault
mfsp %sr7,\tmp
/* check against %r0 which is same value as LINUX_GATEWAY_SPACE */
or,COND(<>) %r0,\spc,%r0 /* user may execute gateway page
* as kernel, so defeat the space
* check if it is */
@ -910,9 +911,9 @@ intr_check_sig:
* Only do signals if we are returning to user space
*/
LDREG PT_IASQ0(%r16), %r20
cmpib,COND(=),n 0,%r20,intr_restore /* backward */
cmpib,COND(=),n LINUX_GATEWAY_SPACE, %r20, intr_restore /* backward */
LDREG PT_IASQ1(%r16), %r20
cmpib,COND(=),n 0,%r20,intr_restore /* backward */
cmpib,COND(=),n LINUX_GATEWAY_SPACE, %r20, intr_restore /* backward */
/* NOTE: We need to enable interrupts if we have to deliver
* signals. We used to do this earlier but it caused kernel