diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/core-api/genericirq.rst | 16 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/hwmon/jc42.txt | 4 | ||||
| -rw-r--r-- | Documentation/driver-api/dmaengine/client.rst | 2 | ||||
| -rw-r--r-- | Documentation/driver-api/pci.rst | 3 | ||||
| -rw-r--r-- | Documentation/printk-formats.txt | 31 | ||||
| -rw-r--r-- | Documentation/scsi/scsi_mid_low_api.txt | 6 | ||||
| -rw-r--r-- | Documentation/sysctl/vm.txt | 7 |
7 files changed, 44 insertions, 25 deletions
diff --git a/Documentation/core-api/genericirq.rst b/Documentation/core-api/genericirq.rst index 0054bd48be84..4da67b65cecf 100644 --- a/Documentation/core-api/genericirq.rst +++ b/Documentation/core-api/genericirq.rst @@ -225,9 +225,9 @@ interrupts. The following control flow is implemented (simplified excerpt):: - :c:func:`desc->irq_data.chip->irq_mask_ack`; + desc->irq_data.chip->irq_mask_ack(); handle_irq_event(desc->action); - :c:func:`desc->irq_data.chip->irq_unmask`; + desc->irq_data.chip->irq_unmask(); Default Fast EOI IRQ flow handler @@ -239,7 +239,7 @@ which only need an EOI at the end of the handler. The following control flow is implemented (simplified excerpt):: handle_irq_event(desc->action); - :c:func:`desc->irq_data.chip->irq_eoi`; + desc->irq_data.chip->irq_eoi(); Default Edge IRQ flow handler @@ -251,15 +251,15 @@ interrupts. The following control flow is implemented (simplified excerpt):: if (desc->status & running) { - :c:func:`desc->irq_data.chip->irq_mask_ack`; + desc->irq_data.chip->irq_mask_ack(); desc->status |= pending | masked; return; } - :c:func:`desc->irq_data.chip->irq_ack`; + desc->irq_data.chip->irq_ack(); desc->status |= running; do { if (desc->status & masked) - :c:func:`desc->irq_data.chip->irq_unmask`; + desc->irq_data.chip->irq_unmask(); desc->status &= ~pending; handle_irq_event(desc->action); } while (status & pending); @@ -293,10 +293,10 @@ simplified version without locking. The following control flow is implemented (simplified excerpt):: if (desc->irq_data.chip->irq_ack) - :c:func:`desc->irq_data.chip->irq_ack`; + desc->irq_data.chip->irq_ack(); handle_irq_event(desc->action); if (desc->irq_data.chip->irq_eoi) - :c:func:`desc->irq_data.chip->irq_eoi`; + desc->irq_data.chip->irq_eoi(); EOI Edge IRQ flow handler diff --git a/Documentation/devicetree/bindings/hwmon/jc42.txt b/Documentation/devicetree/bindings/hwmon/jc42.txt index 07a250498fbb..f569db58f64a 100644 --- a/Documentation/devicetree/bindings/hwmon/jc42.txt +++ b/Documentation/devicetree/bindings/hwmon/jc42.txt @@ -34,6 +34,10 @@ Required properties: - reg: I2C address +Optional properties: +- smbus-timeout-disable: When set, the smbus timeout function will be disabled. + This is not supported on all chips. + Example: temp-sensor@1a { diff --git a/Documentation/driver-api/dmaengine/client.rst b/Documentation/driver-api/dmaengine/client.rst index 6245c99af8c1..fbbb2831f29f 100644 --- a/Documentation/driver-api/dmaengine/client.rst +++ b/Documentation/driver-api/dmaengine/client.rst @@ -185,7 +185,7 @@ The details of these operations are: void dma_async_issue_pending(struct dma_chan *chan); Further APIs: ------------- +------------- 1. Terminate APIs diff --git a/Documentation/driver-api/pci.rst b/Documentation/driver-api/pci.rst index 01a6c8b7d3a7..ca85e5e78b2c 100644 --- a/Documentation/driver-api/pci.rst +++ b/Documentation/driver-api/pci.rst @@ -25,9 +25,6 @@ PCI Support Library .. kernel-doc:: drivers/pci/irq.c :export: -.. kernel-doc:: drivers/pci/htirq.c - :export: - .. kernel-doc:: drivers/pci/probe.c :export: diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt index 361789df51ec..aa0a776c817a 100644 --- a/Documentation/printk-formats.txt +++ b/Documentation/printk-formats.txt @@ -5,7 +5,6 @@ How to get printk format specifiers right :Author: Randy Dunlap <rdunlap@infradead.org> :Author: Andrew Murray <amurray@mpc-data.co.uk> - Integer types ============= @@ -45,6 +44,18 @@ return from vsnprintf. Raw pointer value SHOULD be printed with %p. The kernel supports the following extended format specifiers for pointer types: +Pointer Types +============= + +Pointers printed without a specifier extension (i.e unadorned %p) are +hashed to give a unique identifier without leaking kernel addresses to user +space. On 64 bit machines the first 32 bits are zeroed. If you _really_ +want the address see %px below. + +:: + + %p abcdef12 or 00000000abcdef12 + Symbols/Function Pointers ========================= @@ -85,18 +96,32 @@ Examples:: printk("Faulted at %pS\n", (void *)regs->ip); printk(" %s%pB\n", (reliable ? "" : "? "), (void *)*stack); - Kernel Pointers =============== :: - %pK 0x01234567 or 0x0123456789abcdef + %pK 01234567 or 0123456789abcdef For printing kernel pointers which should be hidden from unprivileged users. The behaviour of ``%pK`` depends on the ``kptr_restrict sysctl`` - see Documentation/sysctl/kernel.txt for more details. +Unmodified Addresses +==================== + +:: + + %px 01234567 or 0123456789abcdef + +For printing pointers when you _really_ want to print the address. Please +consider whether or not you are leaking sensitive information about the +Kernel layout in memory before printing pointers with %px. %px is +functionally equivalent to %lx. %px is preferred to %lx because it is more +uniquely grep'able. If, in the future, we need to modify the way the Kernel +handles printing pointers it will be nice to be able to find the call +sites. + Struct Resources ================ diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt index 6338400eed73..2c31d9ee6776 100644 --- a/Documentation/scsi/scsi_mid_low_api.txt +++ b/Documentation/scsi/scsi_mid_low_api.txt @@ -319,12 +319,12 @@ struct Scsi_Host: instance. If the reference count reaches 0 then the given instance is freed -The Scsi_device structure has had reference counting infrastructure added. -This effectively spreads the ownership of struct Scsi_device instances +The scsi_device structure has had reference counting infrastructure added. +This effectively spreads the ownership of struct scsi_device instances across the various SCSI layers which use them. Previously such instances were exclusively owned by the mid level. See the access functions declared towards the end of include/scsi/scsi_device.h . If an LLD wants to keep -a copy of a pointer to a Scsi_device instance it should use scsi_device_get() +a copy of a pointer to a scsi_device instance it should use scsi_device_get() to bump its reference count. When it is finished with the pointer it can use scsi_device_put() to decrement its reference count (and potentially delete it). diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt index b920423f88cb..5025ff9307e6 100644 --- a/Documentation/sysctl/vm.txt +++ b/Documentation/sysctl/vm.txt @@ -158,10 +158,6 @@ Note: the minimum value allowed for dirty_bytes is two pages (in bytes); any value lower than this limit will be ignored and the old configuration will be retained. -Note: the value of dirty_bytes also must be set greater than -dirty_background_bytes or the amount of memory corresponding to -dirty_background_ratio. - ============================================================== dirty_expire_centisecs @@ -181,9 +177,6 @@ generating disk writes will itself start writing out dirty data. The total available memory is not equal to total system memory. -Note: dirty_ratio must be set greater than dirty_background_ratio or -ratio corresponding to dirty_background_bytes. - ============================================================== dirty_writeback_centisecs |