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authorMax Filippov <jcmvbkbc@gmail.com>2015-09-24 23:11:53 +0300
committerMax Filippov <jcmvbkbc@gmail.com>2015-11-02 18:02:47 +0300
commit5029615e25dc5040beb065f36743c127a8e51497 (patch)
tree8b77e020c58e01175587f5267ab9ab8b223c3652 /arch/xtensa/lib
parent6a13feb9c82803e2b815eca72fa7a9f5561d7861 (diff)
downloadlinux-5029615e25dc5040beb065f36743c127a8e51497.tar.xz
xtensa: fixes for configs without loop option
Build-time fixes: - make lbeg/lend/lcount save/restore conditional on kernel entry; - don't clear lcount in platform_restart functions unconditionally. Run-time fixes: - use correct end of range register in __endla paired with __loopt, not the unused temporary register. This fixes .bss zero-initialization. Update comments in asmmacro.h; - don't clobber a10 in the usercopy that leads to access to unmapped memory. Cc: <stable@vger.kernel.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/lib')
-rw-r--r--arch/xtensa/lib/usercopy.S6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/xtensa/lib/usercopy.S b/arch/xtensa/lib/usercopy.S
index ace1892a875e..7ea4dd68893e 100644
--- a/arch/xtensa/lib/usercopy.S
+++ b/arch/xtensa/lib/usercopy.S
@@ -222,8 +222,8 @@ __xtensa_copy_user:
loopnez a7, .Loop2done
#else /* !XCHAL_HAVE_LOOPS */
beqz a7, .Loop2done
- slli a10, a7, 4
- add a10, a10, a3 # a10 = end of last 16B source chunk
+ slli a12, a7, 4
+ add a12, a12, a3 # a12 = end of last 16B source chunk
#endif /* !XCHAL_HAVE_LOOPS */
.Loop2:
EX(l32i, a7, a3, 4, l_fixup)
@@ -241,7 +241,7 @@ __xtensa_copy_user:
EX(s32i, a9, a5, 12, s_fixup)
addi a5, a5, 16
#if !XCHAL_HAVE_LOOPS
- blt a3, a10, .Loop2
+ blt a3, a12, .Loop2
#endif /* !XCHAL_HAVE_LOOPS */
.Loop2done:
bbci.l a4, 3, .L12