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authorJames Hogan <james.hogan@imgtec.com>2015-08-05 16:41:39 +0100
committerRalf Baechle <ralf@linux-mips.org>2015-12-22 11:58:43 +0100
commitd6a428fb583738ad685c91a684748cdee7b2a05f (patch)
treea0c987da5c8d66400b4cb40628921a775bc99ae8 /arch/mips/lib/memset.S
parent6f06a2c45d8d714ea3b11a360b4a7191e52acaa4 (diff)
MIPS: uaccess: Take EVA into account in [__]clear_user
__clear_user() (and clear_user() which uses it), always access the user mode address space, which results in EVA store instructions when EVA is enabled even if the current user address limit is KERNEL_DS. Fix this by adding a new symbol __bzero_kernel for the normal kernel address space bzero in EVA mode, and call that from __clear_user() if eva_kernel_access(). Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10844/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lib/memset.S')
-rw-r--r--arch/mips/lib/memset.S2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/lib/memset.S b/arch/mips/lib/memset.S
index b8e63fd00375..8f0019a2e5c8 100644
--- a/arch/mips/lib/memset.S
+++ b/arch/mips/lib/memset.S
@@ -283,6 +283,8 @@ LEAF(memset)
1:
#ifndef CONFIG_EVA
FEXPORT(__bzero)
+#else
+FEXPORT(__bzero_kernel)
#endif
__BUILD_BZERO LEGACY_MODE