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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 11:30:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 11:30:22 -0800
commit14c79092909a52b6fd6394b6ad5e7756c4f9565e (patch)
treec9ab2a50aa00c8888cc90006a0e012782b0ccc19
parent1b1050cdc5cdde43177b375b5f22dc070d45d8f8 (diff)
parenta01fece2e4185ac173abd16d10304d73d47ebf00 (diff)
downloadlinux-14c79092909a52b6fd6394b6ad5e7756c4f9565e.tar.gz
Merge branch 'parisc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc updates from Helge Deller: "The most important change is that we reduce L1_CACHE_BYTES to 16 bytes, for which a trivial patch for XPS in the network layer was needed. Then we wire up the sys_membarrier and userfaultfd syscalls and added two other small cleanups" * 'parisc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Change L1_CACHE_BYTES to 16 net/xps: Fix calculation of initial number of xps queues parisc: reduce syslog debug output parisc: serial/mux: Convert to uart_console_device instead of open-coded parisc: Wire up userfaultfd syscall parisc: allocate sys_membarrier system call number
-rw-r--r--arch/parisc/include/asm/cache.h18
-rw-r--r--arch/parisc/include/uapi/asm/unistd.h4
-rw-r--r--arch/parisc/kernel/syscall_table.S2
-rw-r--r--drivers/parisc/lba_pci.c12
-rw-r--r--drivers/tty/serial/mux.c9
-rw-r--r--include/linux/netdevice.h4
6 files changed, 20 insertions, 29 deletions
diff --git a/arch/parisc/include/asm/cache.h b/arch/parisc/include/asm/cache.h
index 47f11c7..3d0e17b 100644
--- a/arch/parisc/include/asm/cache.h
+++ b/arch/parisc/include/asm/cache.h
@@ -7,20 +7,12 @@
/*
- * PA 2.0 processors have 64-byte cachelines; PA 1.1 processors have
- * 32-byte cachelines. The default configuration is not for SMP anyway,
- * so if you're building for SMP, you should select the appropriate
- * processor type. There is a potential livelock danger when running
- * a machine with this value set too small, but it's more probable you'll
- * just ruin performance.
+ * PA 2.0 processors have 64 and 128-byte L2 cachelines; PA 1.1 processors
+ * have 32-byte cachelines. The L1 length appears to be 16 bytes but this
+ * is not clearly documented.
*/
-#ifdef CONFIG_PA20
-#define L1_CACHE_BYTES 64
-#define L1_CACHE_SHIFT 6
-#else
-#define L1_CACHE_BYTES 32
-#define L1_CACHE_SHIFT 5
-#endif
+#define L1_CACHE_BYTES 16
+#define L1_CACHE_SHIFT 4
#ifndef __ASSEMBLY__
diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h
index 2e639d7..3317038 100644
--- a/arch/parisc/include/uapi/asm/unistd.h
+++ b/arch/parisc/include/uapi/asm/unistd.h
@@ -358,8 +358,10 @@
#define __NR_memfd_create (__NR_Linux + 340)
#define __NR_bpf (__NR_Linux + 341)
#define __NR_execveat (__NR_Linux + 342)
+#define __NR_membarrier (__NR_Linux + 343)
+#define __NR_userfaultfd (__NR_Linux + 344)
-#define __NR_Linux_syscalls (__NR_execveat + 1)
+#define __NR_Linux_syscalls (__NR_userfaultfd + 1)
#define __IGNORE_select /* newselect */
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 8eefb12..78c3ef8 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -438,6 +438,8 @@
ENTRY_SAME(memfd_create) /* 340 */
ENTRY_SAME(bpf)
ENTRY_COMP(execveat)
+ ENTRY_SAME(membarrier)
+ ENTRY_SAME(userfaultfd)
.ifne (. - 90b) - (__NR_Linux_syscalls * (91b - 90b))
diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c
index a32c1f6..42844c2 100644
--- a/drivers/parisc/lba_pci.c
+++ b/drivers/parisc/lba_pci.c
@@ -624,6 +624,10 @@ extend_lmmio_len(unsigned long start, unsigned long end, unsigned long lba_len)
{
struct resource *tmp;
+ /* exit if not a C8000 */
+ if (boot_cpu_data.cpu_type < mako)
+ return end;
+
pr_debug("LMMIO mismatch: PAT length = 0x%lx, MASK register = 0x%lx\n",
end - start, lba_len);
@@ -631,10 +635,6 @@ extend_lmmio_len(unsigned long start, unsigned long end, unsigned long lba_len)
pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - original\n", start, end);
- if (boot_cpu_data.cpu_type < mako) {
- pr_info("LBA: Not a C8000 system - not extending LMMIO range.\n");
- return end;
- }
end += lba_len;
if (end < start) /* fix overflow */
@@ -1557,9 +1557,9 @@ lba_driver_probe(struct parisc_device *dev)
pci_add_resource_offset(&resources, &lba_dev->hba.lmmio_space,
lba_dev->hba.lmmio_space_offset);
if (lba_dev->hba.gmmio_space.flags) {
+ /* Not registering GMMIO space - according to docs it's not
+ * even used on HP-UX. */
/* pci_add_resource(&resources, &lba_dev->hba.gmmio_space); */
- pr_warn("LBA: Not registering GMMIO space %pR\n",
- &lba_dev->hba.gmmio_space);
}
pci_add_resource(&resources, &lba_dev->hba.bus_num);
diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c
index dd26511..8a4be4b 100644
--- a/drivers/tty/serial/mux.c
+++ b/drivers/tty/serial/mux.c
@@ -412,19 +412,14 @@ static int mux_console_setup(struct console *co, char *options)
return 0;
}
-struct tty_driver *mux_console_device(struct console *co, int *index)
-{
- *index = co->index;
- return mux_driver.tty_driver;
-}
-
static struct console mux_console = {
.name = "ttyB",
.write = mux_console_write,
- .device = mux_console_device,
+ .device = uart_console_device,
.setup = mux_console_setup,
.flags = CON_ENABLED | CON_PRINTBUFFER,
.index = 0,
+ .data = &mux_driver,
};
#define MUX_CONSOLE &mux_console
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 4ac653b..a9e3bf4 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -718,8 +718,8 @@ struct xps_map {
u16 queues[0];
};
#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
-#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
- / sizeof(u16))
+#define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
+ - sizeof(struct xps_map)) / sizeof(u16))
/*
* This structure holds all XPS maps for device. Maps are indexed by CPU.