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-rw-r--r--Documentation/lguest/lguest.c23
-rw-r--r--arch/powerpc/Kconfig3
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--arch/x86/mm/Makefile3
-rw-r--r--drivers/char/hvc_console.c5
-rw-r--r--drivers/lguest/page_tables.c25
-rw-r--r--include/linux/Kbuild1
-rw-r--r--include/linux/init.h1
-rw-r--r--include/linux/mm.h20
-rw-r--r--init/main.c6
-rw-r--r--kernel/module.c2
-rw-r--r--kernel/stop_machine.c1
-rw-r--r--mm/Kconfig3
-rw-r--r--mm/util.c15
14 files changed, 35 insertions, 74 deletions
diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c
index b88b0ea54e9..655414821ed 100644
--- a/Documentation/lguest/lguest.c
+++ b/Documentation/lguest/lguest.c
@@ -1447,21 +1447,6 @@ static void configure_device(int fd, const char *tapif, u32 ipaddr)
err(1, "Bringing interface %s up", tapif);
}
-static void get_mac(int fd, const char *tapif, unsigned char hwaddr[6])
-{
- struct ifreq ifr;
-
- memset(&ifr, 0, sizeof(ifr));
- strcpy(ifr.ifr_name, tapif);
-
- /* SIOC stands for Socket I/O Control. G means Get (vs S for Set
- * above). IF means Interface, and HWADDR is hardware address.
- * Simple! */
- if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0)
- err(1, "getting hw address for %s", tapif);
- memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, 6);
-}
-
static int get_tun_device(char tapif[IFNAMSIZ])
{
struct ifreq ifr;
@@ -1531,11 +1516,8 @@ static void setup_tun_net(char *arg)
p = strchr(arg, ':');
if (p) {
str2mac(p+1, conf.mac);
+ add_feature(dev, VIRTIO_NET_F_MAC);
*p = '\0';
- } else {
- p = arg + strlen(arg);
- /* None supplied; query the randomly assigned mac. */
- get_mac(ipfd, tapif, conf.mac);
}
/* arg is now either an IP address or a bridge name */
@@ -1547,13 +1529,10 @@ static void setup_tun_net(char *arg)
/* Set up the tun device. */
configure_device(ipfd, tapif, ip);
- /* Tell Guest what MAC address to use. */
- add_feature(dev, VIRTIO_NET_F_MAC);
add_feature(dev, VIRTIO_F_NOTIFY_ON_EMPTY);
/* Expect Guest to handle everything except UFO */
add_feature(dev, VIRTIO_NET_F_CSUM);
add_feature(dev, VIRTIO_NET_F_GUEST_CSUM);
- add_feature(dev, VIRTIO_NET_F_MAC);
add_feature(dev, VIRTIO_NET_F_GUEST_TSO4);
add_feature(dev, VIRTIO_NET_F_GUEST_TSO6);
add_feature(dev, VIRTIO_NET_F_GUEST_ECN);
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 63c9cafda9c..587da5e0990 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -42,9 +42,6 @@ config GENERIC_HARDIRQS
bool
default y
-config HAVE_GET_USER_PAGES_FAST
- def_bool PPC64
-
config HAVE_SETUP_PER_CPU_AREA
def_bool PPC64
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 3d0f2b6a5a1..ac2fb0641a0 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -22,7 +22,6 @@ config X86
select HAVE_IDE
select HAVE_OPROFILE
select HAVE_IOREMAP_PROT
- select HAVE_GET_USER_PAGES_FAST
select HAVE_KPROBES
select ARCH_WANT_OPTIONAL_GPIOLIB
select HAVE_KRETPROBES
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index 2977ea37791..dfb932dcf13 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -1,7 +1,6 @@
obj-y := init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \
- pat.o pgtable.o
+ pat.o pgtable.o gup.o
-obj-$(CONFIG_HAVE_GET_USER_PAGES_FAST) += gup.o
obj-$(CONFIG_X86_32) += pgtable_32.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 02aac104842..fd64137b1ab 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -322,11 +322,10 @@ static int hvc_open(struct tty_struct *tty, struct file * filp)
hp->tty = tty;
- if (hp->ops->notifier_add)
- rc = hp->ops->notifier_add(hp, hp->data);
-
spin_unlock_irqrestore(&hp->lock, flags);
+ if (hp->ops->notifier_add)
+ rc = hp->ops->notifier_add(hp, hp->data);
/*
* If the notifier fails we return an error. The tty layer
diff --git a/drivers/lguest/page_tables.c b/drivers/lguest/page_tables.c
index d93500f24fb..81d0c605344 100644
--- a/drivers/lguest/page_tables.c
+++ b/drivers/lguest/page_tables.c
@@ -108,9 +108,8 @@ static unsigned long gpte_addr(pgd_t gpgd, unsigned long vaddr)
}
/*:*/
-/*M:014 get_pfn is slow; it takes the mmap sem and calls get_user_pages. We
- * could probably try to grab batches of pages here as an optimization
- * (ie. pre-faulting). :*/
+/*M:014 get_pfn is slow: we could probably try to grab batches of pages here as
+ * an optimization (ie. pre-faulting). :*/
/*H:350 This routine takes a page number given by the Guest and converts it to
* an actual, physical page number. It can fail for several reasons: the
@@ -123,19 +122,13 @@ static unsigned long gpte_addr(pgd_t gpgd, unsigned long vaddr)
static unsigned long get_pfn(unsigned long virtpfn, int write)
{
struct page *page;
- /* This value indicates failure. */
- unsigned long ret = -1UL;
- /* get_user_pages() is a complex interface: it gets the "struct
- * vm_area_struct" and "struct page" assocated with a range of pages.
- * It also needs the task's mmap_sem held, and is not very quick.
- * It returns the number of pages it got. */
- down_read(&current->mm->mmap_sem);
- if (get_user_pages(current, current->mm, virtpfn << PAGE_SHIFT,
- 1, write, 1, &page, NULL) == 1)
- ret = page_to_pfn(page);
- up_read(&current->mm->mmap_sem);
- return ret;
+ /* gup me one page at this address please! */
+ if (get_user_pages_fast(virtpfn << PAGE_SHIFT, 1, write, &page) == 1)
+ return page_to_pfn(page);
+
+ /* This value indicates failure. */
+ return -1UL;
}
/*H:340 Converting a Guest page table entry to a shadow (ie. real) page table
@@ -174,7 +167,7 @@ static pte_t gpte_to_spte(struct lg_cpu *cpu, pte_t gpte, int write)
/*H:460 And to complete the chain, release_pte() looks like this: */
static void release_pte(pte_t pte)
{
- /* Remember that get_user_pages() took a reference to the page, in
+ /* Remember that get_user_pages_fast() took a reference to the page, in
* get_pfn()? We have to put it back now. */
if (pte_flags(pte) & _PAGE_PRESENT)
put_page(pfn_to_page(pte_pfn(pte)));
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index a26f565e818..327f60658d9 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -356,6 +356,7 @@ unifdef-y += virtio_balloon.h
unifdef-y += virtio_console.h
unifdef-y += virtio_pci.h
unifdef-y += virtio_ring.h
+unifdef-y += virtio_rng.h
unifdef-y += vt.h
unifdef-y += wait.h
unifdef-y += wanrouter.h
diff --git a/include/linux/init.h b/include/linux/init.h
index 11b84e10605..93538b696e3 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -139,6 +139,7 @@ extern initcall_t __con_initcall_start[], __con_initcall_end[];
extern initcall_t __security_initcall_start[], __security_initcall_end[];
/* Defined in init/main.c */
+extern int do_one_initcall(initcall_t fn);
extern char __initdata boot_command_line[];
extern char *saved_command_line;
extern unsigned int reset_devices;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 335288bff1b..fa651609b65 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -834,7 +834,6 @@ extern int mprotect_fixup(struct vm_area_struct *vma,
struct vm_area_struct **pprev, unsigned long start,
unsigned long end, unsigned long newflags);
-#ifdef CONFIG_HAVE_GET_USER_PAGES_FAST
/*
* get_user_pages_fast provides equivalent functionality to get_user_pages,
* operating on current and current->mm (force=0 and doesn't return any vmas).
@@ -848,25 +847,6 @@ extern int mprotect_fixup(struct vm_area_struct *vma,
int get_user_pages_fast(unsigned long start, int nr_pages, int write,
struct page **pages);
-#else
-/*
- * Should probably be moved to asm-generic, and architectures can include it if
- * they don't implement their own get_user_pages_fast.
- */
-#define get_user_pages_fast(start, nr_pages, write, pages) \
-({ \
- struct mm_struct *mm = current->mm; \
- int ret; \
- \
- down_read(&mm->mmap_sem); \
- ret = get_user_pages(current, mm, start, nr_pages, \
- write, 0, pages, NULL); \
- up_read(&mm->mmap_sem); \
- \
- ret; \
-})
-#endif
-
/*
* A callback you can register to apply pressure to ageable caches.
*
diff --git a/init/main.c b/init/main.c
index 0bc7e167bf4..f6f7042331d 100644
--- a/init/main.c
+++ b/init/main.c
@@ -691,7 +691,7 @@ asmlinkage void __init start_kernel(void)
rest_init();
}
-static int __initdata initcall_debug;
+static int initcall_debug;
static int __init initcall_debug_setup(char *str)
{
@@ -700,7 +700,7 @@ static int __init initcall_debug_setup(char *str)
}
__setup("initcall_debug", initcall_debug_setup);
-static void __init do_one_initcall(initcall_t fn)
+int do_one_initcall(initcall_t fn)
{
int count = preempt_count();
ktime_t t0, t1, delta;
@@ -740,6 +740,8 @@ static void __init do_one_initcall(initcall_t fn)
print_fn_descriptor_symbol(KERN_WARNING "initcall %s", fn);
printk(" returned with %s\n", msgbuf);
}
+
+ return result;
}
diff --git a/kernel/module.c b/kernel/module.c
index 61d212120df..08864d257eb 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2288,7 +2288,7 @@ sys_init_module(void __user *umod,
/* Start the module */
if (mod->init != NULL)
- ret = mod->init();
+ ret = do_one_initcall(mod->init);
if (ret < 0) {
/* Init routine failed: abort. Try to protect us from
buggy refcounters. */
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index e446c7c7d6a..af3c7cea258 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -65,7 +65,6 @@ static void ack_state(void)
static int stop_cpu(struct stop_machine_data *smdata)
{
enum stopmachine_state curstate = STOPMACHINE_NONE;
- int uninitialized_var(ret);
/* Simple state machine */
do {
diff --git a/mm/Kconfig b/mm/Kconfig
index 446c6588c75..0bd9c2dbb2a 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -77,9 +77,6 @@ config FLAT_NODE_MEM_MAP
def_bool y
depends on !SPARSEMEM
-config HAVE_GET_USER_PAGES_FAST
- bool
-
#
# Both the NUMA code and DISCONTIGMEM use arrays of pg_data_t's
# to represent different areas of memory. This variable allows
diff --git a/mm/util.c b/mm/util.c
index 9341ca77bd8..cb00b748ce4 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -171,3 +171,18 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
mm->unmap_area = arch_unmap_area;
}
#endif
+
+int __attribute__((weak)) get_user_pages_fast(unsigned long start,
+ int nr_pages, int write, struct page **pages)
+{
+ struct mm_struct *mm = current->mm;
+ int ret;
+
+ down_read(&mm->mmap_sem);
+ ret = get_user_pages(current, mm, start, nr_pages,
+ write, 0, pages, NULL);
+ up_read(&mm->mmap_sem);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(get_user_pages_fast);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 17:04:40 +0000