openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

powerpc/book3s64: Remove __end_handlers marker 

The __end_handlers marker was intended to mark down upto code that gets
called from exception prologs. But that hasn't kept pace with code
changes. Case in point, slb_miss_realmode being called from exception
prolog code but isn't below __end_handlers marker. So, __end_handlers
marker is as good as a comment but could be misleading at times if it
isn't in sync with the code, as is the case now. So, let us avoid this
confusion by having a better comment and removing __end_handlers marker
altogether.

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Hari Bathini 2016-04-08 03:30:34 +05:30 committed by Michael Ellerman
parent 8ed8ab4004
commit 057b6d7e62
1 changed files with 4 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
arch/powerpc/kernel/exceptions-64s.S
View File

@ -726,11 +726,10 @@ kvmppc_skip_Hinterrupt:
#endif
/*
* Code from here down to __end_handlers is invoked from the
* exception prologs above. Because the prologs assemble the
* addresses of these handlers using the LOAD_HANDLER macro,
* which uses an ori instruction, these handlers must be in
* the first 64k of the kernel image.
* Ensure that any handlers that get invoked from the exception prologs
* above are below the first 64KB (0x10000) of the kernel image because
* the prologs assemble the addresses of these handlers using the
* LOAD_HANDLER macro, which uses an ori instruction.
*/
/*** Common interrupt handlers ***/
@ -1123,10 +1122,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
STD_EXCEPTION_COMMON(0xf60, facility_unavailable, facility_unavailable_exception)
STD_EXCEPTION_COMMON(0xf80, hv_facility_unavailable, facility_unavailable_exception)
.align 7
.globl __end_handlers
__end_handlers:
/* Equivalents to the above handlers for relocation-on interrupt vectors */
STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist)
MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell)