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authorHeiko Carstens <heiko.carstens@de.ibm.com>2016-06-20 15:03:25 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-06-28 10:32:32 +0300
commit7b411ac6b755b211423dfd37c59a7dad5a5e0bf1 (patch)
tree3ee3c61f8dc7a5025238aec62925c5d1a5440a94 /arch/s390/pci
parenteb090ad2ad5c7d0b4264a54f371683f2b2de1f9d (diff)
downloadlinux-7b411ac6b755b211423dfd37c59a7dad5a5e0bf1.tar.xz
s390/pci: use basic blocks for pci inline assemblies
Use only simple inline assemblies which consist of a single basic block if the register asm construct is being used. Otherwise gcc would generate broken code if the compiler option --sanitize-coverage=trace-pc would be used. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/pci')
-rw-r--r--arch/s390/pci/pci_insn.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/s390/pci/pci_insn.c b/arch/s390/pci/pci_insn.c
index 10ca15dcab11..fa8d7d4b9751 100644
--- a/arch/s390/pci/pci_insn.c
+++ b/arch/s390/pci/pci_insn.c
@@ -99,7 +99,7 @@ void zpci_set_irq_ctrl(u16 ctl, char *unused, u8 isc)
}
/* PCI Load */
-static inline int __pcilg(u64 *data, u64 req, u64 offset, u8 *status)
+static inline int ____pcilg(u64 *data, u64 req, u64 offset, u8 *status)
{
register u64 __req asm("2") = req;
register u64 __offset asm("3") = offset;
@@ -116,6 +116,16 @@ static inline int __pcilg(u64 *data, u64 req, u64 offset, u8 *status)
: "d" (__offset)
: "cc");
*status = __req >> 24 & 0xff;
+ *data = __data;
+ return cc;
+}
+
+static inline int __pcilg(u64 *data, u64 req, u64 offset, u8 *status)
+{
+ u64 __data;
+ int cc;
+
+ cc = ____pcilg(&__data, req, offset, status);
if (!cc)
*data = __data;