From d50349b0c397407458ea8c57aee765d158e6f9ee Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 24 Apr 2012 02:37:07 -0400 Subject: um: add TIF_NOTIFY_RESUME Signed-off-by: Al Viro --- arch/um/include/asm/thread_info.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/um/include') diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread_info.h index 200c4ab1240c..6d85ebb860fd 100644 --- a/arch/um/include/asm/thread_info.h +++ b/arch/um/include/asm/thread_info.h @@ -71,6 +71,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_MEMDIE 5 /* is terminating due to OOM killer */ #define TIF_SYSCALL_AUDIT 6 #define TIF_RESTORE_SIGMASK 7 +#define TIF_NOTIFY_RESUME 8 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) -- cgit v1.2.3 From c6802f4370510fa8674674f11c5578ee057d1d63 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 21 May 2012 14:22:25 -0400 Subject: um: bury unused _TIF_RESTORE_SIGMASK Signed-off-by: Al Viro --- arch/um/include/asm/thread_info.h | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/um/include') diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread_info.h index 6d85ebb860fd..c04e5ab68f56 100644 --- a/arch/um/include/asm/thread_info.h +++ b/arch/um/include/asm/thread_info.h @@ -79,6 +79,5 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) #define _TIF_MEMDIE (1 << TIF_MEMDIE) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) -#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) #endif -- cgit v1.2.3 From f15b9000eb1d09bbaa4b0a6b2089d7e1f64e84b3 Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Sat, 14 Apr 2012 17:29:30 +0200 Subject: um: Implement a custom pte_same() function UML uses the _PAGE_NEWPAGE flag to mark pages which are not jet installed on the host side using mmap(). pte_same() has to ignore this flag, otherwise unuse_pte_range() is unable to unuse the page because two identical page tables entries with different _PAGE_NEWPAGE flags would not match and swapoff() would never return. CC: stable@kernel.org Analyzed-by: Hugh Dickins Signed-off-by: Richard Weinberger --- arch/um/include/asm/pgtable.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/um/include') diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h index 6a3f9845743e..294254e13a35 100644 --- a/arch/um/include/asm/pgtable.h +++ b/arch/um/include/asm/pgtable.h @@ -273,6 +273,12 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval) } #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) +#define __HAVE_ARCH_PTE_SAME +static inline int pte_same(pte_t pte_a, pte_t pte_b) +{ + return !((pte_val(pte_a) ^ pte_val(pte_b)) & ~_PAGE_NEWPAGE); +} + /* * Conversion functions: convert a page and protection to a page entry, * and a page entry and page directory to the page they refer to. -- cgit v1.2.3 From 2b76ebaa728f8a3967c52aa189261c72fe56a6f1 Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Sat, 14 Apr 2012 17:46:01 +0200 Subject: um: Fix __swp_type() The current __swp_type() function uses a too small bitshift. Using more than one swap files causes bad pages because the type bits clash with other page flags. CC: stable@kernel.org Analyzed-by: Hugh Dickins Signed-off-by: Richard Weinberger --- arch/um/include/asm/pgtable.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/um/include') diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h index 294254e13a35..5888f1b83477 100644 --- a/arch/um/include/asm/pgtable.h +++ b/arch/um/include/asm/pgtable.h @@ -354,11 +354,11 @@ extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr); #define update_mmu_cache(vma,address,ptep) do ; while (0) /* Encode and de-code a swap entry */ -#define __swp_type(x) (((x).val >> 4) & 0x3f) +#define __swp_type(x) (((x).val >> 5) & 0x1f) #define __swp_offset(x) ((x).val >> 11) #define __swp_entry(type, offset) \ - ((swp_entry_t) { ((type) << 4) | ((offset) << 11) }) + ((swp_entry_t) { ((type) << 5) | ((offset) << 11) }) #define __pte_to_swp_entry(pte) \ ((swp_entry_t) { pte_val(pte_mkuptodate(pte)) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) -- cgit v1.2.3 From fa7a0449e0ea6588f64c06a045ea8728280f3457 Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Tue, 17 Apr 2012 22:37:13 +0200 Subject: um: Implement um_free_irq() Instead of using chip->release() we can achieve the same using a simple wrapper for free_irq(). We have already um_request_irq(), so um_free_irq() is the perfect counterpart. Signed-off-by: Richard Weinberger Reviewed-by: Thomas Gleixner --- arch/um/drivers/chan_kern.c | 9 +++++---- arch/um/drivers/line.c | 2 +- arch/um/drivers/net_kern.c | 4 ++-- arch/um/drivers/port_kern.c | 2 +- arch/um/drivers/xterm_kern.c | 2 +- arch/um/include/shared/irq_kern.h | 2 +- arch/um/kernel/irq.c | 7 +++++++ 7 files changed, 18 insertions(+), 10 deletions(-) (limited to 'arch/um/include') diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c index ca4c7ebfd0aa..45e248c2f43c 100644 --- a/arch/um/drivers/chan_kern.c +++ b/arch/um/drivers/chan_kern.c @@ -8,6 +8,7 @@ #include #include "chan.h" #include "os.h" +#include "irq_kern.h" #ifdef CONFIG_NOCONFIG_CHAN static void *not_configged_init(char *str, int device, @@ -213,9 +214,9 @@ void free_irqs(void) chan = list_entry(ele, struct chan, free_list); if (chan->input && chan->enabled) - free_irq(chan->line->driver->read_irq, chan); + um_free_irq(chan->line->driver->read_irq, chan); if (chan->output && chan->enabled) - free_irq(chan->line->driver->write_irq, chan); + um_free_irq(chan->line->driver->write_irq, chan); chan->enabled = 0; } } @@ -234,9 +235,9 @@ static void close_one_chan(struct chan *chan, int delay_free_irq) } else { if (chan->input && chan->enabled) - free_irq(chan->line->driver->read_irq, chan); + um_free_irq(chan->line->driver->read_irq, chan); if (chan->output && chan->enabled) - free_irq(chan->line->driver->write_irq, chan); + um_free_irq(chan->line->driver->write_irq, chan); chan->enabled = 0; } if (chan->ops->close != NULL) diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 4ab0d9c0911c..acfd0e0fd0c9 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -699,7 +699,7 @@ struct winch { static void __free_winch(struct work_struct *work) { struct winch *winch = container_of(work, struct winch, work); - free_irq(WINCH_IRQ, winch); + um_free_irq(WINCH_IRQ, winch); if (winch->pid != -1) os_kill_process(winch->pid, 1); diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 95f4416e6d9f..0d60c5685c26 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -195,7 +195,7 @@ static int uml_net_close(struct net_device *dev) netif_stop_queue(dev); - free_irq(dev->irq, dev); + um_free_irq(dev->irq, dev); if (lp->close != NULL) (*lp->close)(lp->fd, &lp->user); lp->fd = -1; @@ -835,7 +835,7 @@ static void close_devices(void) spin_lock(&opened_lock); list_for_each(ele, &opened) { lp = list_entry(ele, struct uml_net_private, list); - free_irq(lp->dev->irq, lp->dev); + um_free_irq(lp->dev->irq, lp->dev); if ((lp->close != NULL) && (lp->fd >= 0)) (*lp->close)(lp->fd, &lp->user); if (lp->remove != NULL) diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c index e31680e662a4..11866ffd45a9 100644 --- a/arch/um/drivers/port_kern.c +++ b/arch/um/drivers/port_kern.c @@ -254,7 +254,7 @@ int port_wait(void *data) * connection. Then we loop here throwing out failed * connections until a good one is found. */ - free_irq(TELNETD_IRQ, conn); + um_free_irq(TELNETD_IRQ, conn); if (conn->fd >= 0) break; diff --git a/arch/um/drivers/xterm_kern.c b/arch/um/drivers/xterm_kern.c index 8bd130f0bda3..b68bbe269e01 100644 --- a/arch/um/drivers/xterm_kern.c +++ b/arch/um/drivers/xterm_kern.c @@ -65,7 +65,7 @@ int xterm_fd(int socket, int *pid_out) * isn't set) this will hang... */ wait_for_completion(&data->ready); - free_irq(XTERM_IRQ, data); + um_free_irq(XTERM_IRQ, data); ret = data->new_fd; *pid_out = data->pid; diff --git a/arch/um/include/shared/irq_kern.h b/arch/um/include/shared/irq_kern.h index b05d22f3d84e..7a5bfa6291b8 100644 --- a/arch/um/include/shared/irq_kern.h +++ b/arch/um/include/shared/irq_kern.h @@ -13,6 +13,6 @@ extern int um_request_irq(unsigned int irq, int fd, int type, irq_handler_t handler, unsigned long irqflags, const char * devname, void *dev_id); - +void um_free_irq(unsigned int irq, void *dev); #endif diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index 71b8c947e5ef..47a09eea49ed 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -297,6 +297,13 @@ unsigned int do_IRQ(int irq, struct uml_pt_regs *regs) return 1; } +void um_free_irq(unsigned int irq, void *dev) +{ + free_irq_by_irq_and_dev(irq, dev); + free_irq(irq, dev); +} +EXPORT_SYMBOL(um_free_irq); + int um_request_irq(unsigned int irq, int fd, int type, irq_handler_t handler, unsigned long irqflags, const char * devname, -- cgit v1.2.3