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authorLinus Torvalds <torvalds@linux-foundation.org>2009-11-09 09:51:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-11-09 09:51:15 -0800
commitaa907639f1d9fe0e3274b4f6c1088542f750a539 (patch)
tree9a49056ae536d51cb8146c2fdbaaf751f75f9a7f /arch
parenta58695bb9d63764da9607bf1e7ff09ef03b190a8 (diff)
parent1c9d80ddc60f8ac26344ec3db9830e5f8016c16d (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc: Move of_set_property_mutex acquisition outside of devtree_lock grab. sparc64: replace parentheses in pmul() sparc64: Add a comment about why we only use certain memory barriers these days.
Diffstat (limited to 'arch')
-rw-r--r--arch/sparc/include/asm/system_64.h4
-rw-r--r--arch/sparc/kernel/prom_common.c4
-rw-r--r--arch/sparc/kernel/visemul.c2
3 files changed, 7 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/system_64.h b/arch/sparc/include/asm/system_64.h
index 25e848f0cad..d47a98e6697 100644
--- a/arch/sparc/include/asm/system_64.h
+++ b/arch/sparc/include/asm/system_64.h
@@ -63,6 +63,10 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
: : : "memory"); \
} while (0)
+/* The kernel always executes in TSO memory model these days,
+ * and furthermore most sparc64 chips implement more stringent
+ * memory ordering than required by the specifications.
+ */
#define mb() membar_safe("#StoreLoad")
#define rmb() __asm__ __volatile__("":::"memory")
#define wmb() __asm__ __volatile__("":::"memory")
diff --git a/arch/sparc/kernel/prom_common.c b/arch/sparc/kernel/prom_common.c
index 138910c6720..d80a65d9e89 100644
--- a/arch/sparc/kernel/prom_common.c
+++ b/arch/sparc/kernel/prom_common.c
@@ -79,6 +79,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
err = -ENODEV;
+ mutex_lock(&of_set_property_mutex);
write_lock(&devtree_lock);
prevp = &dp->properties;
while (*prevp) {
@@ -88,9 +89,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
void *old_val = prop->value;
int ret;
- mutex_lock(&of_set_property_mutex);
ret = prom_setprop(dp->node, name, val, len);
- mutex_unlock(&of_set_property_mutex);
err = -EINVAL;
if (ret >= 0) {
@@ -109,6 +108,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
prevp = &(*prevp)->next;
}
write_unlock(&devtree_lock);
+ mutex_unlock(&of_set_property_mutex);
/* XXX Upate procfs if necessary... */
diff --git a/arch/sparc/kernel/visemul.c b/arch/sparc/kernel/visemul.c
index b956fd71c13..d231cbd5c52 100644
--- a/arch/sparc/kernel/visemul.c
+++ b/arch/sparc/kernel/visemul.c
@@ -617,7 +617,7 @@ static void pmul(struct pt_regs *regs, unsigned int insn, unsigned int opf)
rs2 = fps_regval(f, RS2(insn));
rd_val = 0;
- src2 = (rs2 >> (opf == FMUL8x16AU_OPF) ? 16 : 0);
+ src2 = rs2 >> (opf == FMUL8x16AU_OPF ? 16 : 0);
for (byte = 0; byte < 4; byte++) {
u16 src1 = (rs1 >> (byte * 8)) & 0x00ff;
u32 prod = src1 * src2;