From: Stefan Kristiansson Date: Thu, 3 Jul 2014 17:46:40 +0000 (+0300) Subject: openrisc: include l.swa in check for write data pagefault X-Git-Tag: v4.14-rc1~1968^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cdb75442fedff8cc3ddedbe6e41d00b471634e17;p=platform%2Fkernel%2Flinux-rpi.git openrisc: include l.swa in check for write data pagefault During page fault handling we check the last instruction to understand if the fault was for a read or for a write. By default we fall back to read. New instructions were added to the openrisc 1.1 spec for an atomic load/store pair (l.lwa/l.swa). This patch adds the opcode for l.swa (0x33) allowing it to be treated as a write operation. Signed-off-by: Stefan Kristiansson [shorne@gmail.com: expanded a bit on the comment] Signed-off-by: Stafford Horne --- diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S index 572d223..aac0bde 100644 --- a/arch/openrisc/kernel/entry.S +++ b/arch/openrisc/kernel/entry.S @@ -264,7 +264,7 @@ EXCEPTION_ENTRY(_data_page_fault_handler) l.srli r6,r6,26 // check opcode for write access #endif - l.sfgeui r6,0x34 // check opcode for write access + l.sfgeui r6,0x33 // check opcode for write access l.bnf 1f l.sfleui r6,0x37 l.bnf 1f