diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/blk-mq.h | 2 | ||||
| -rw-r--r-- | include/linux/device.h | 26 | ||||
| -rw-r--r-- | include/linux/iio/consumer.h | 37 | ||||
| -rw-r--r-- | include/linux/int_log.h | 56 | ||||
| -rw-r--r-- | include/linux/jbd2.h | 7 | ||||
| -rw-r--r-- | include/linux/minmax.h | 64 | ||||
| -rw-r--r-- | include/linux/platform_device.h | 28 | ||||
| -rw-r--r-- | include/linux/tcp.h | 2 |
8 files changed, 203 insertions, 19 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index b96e00499f9e..495ca198775f 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -397,8 +397,6 @@ struct blk_mq_hw_ctx { */ struct blk_mq_tags *sched_tags; - /** @queued: Number of queued requests. */ - unsigned long queued; /** @run: Number of dispatched requests. */ unsigned long run; diff --git a/include/linux/device.h b/include/linux/device.h index bbaeabd04b0d..6731d7dc1a2a 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -349,6 +349,7 @@ unsigned long devm_get_free_pages(struct device *dev, gfp_t gfp_mask, unsigned int order); void devm_free_pages(struct device *dev, unsigned long addr); +#ifdef CONFIG_HAS_IOMEM void __iomem *devm_ioremap_resource(struct device *dev, const struct resource *res); void __iomem *devm_ioremap_resource_wc(struct device *dev, @@ -357,6 +358,31 @@ void __iomem *devm_ioremap_resource_wc(struct device *dev, void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index, resource_size_t *size); +#else + +static inline +void __iomem *devm_ioremap_resource(struct device *dev, + const struct resource *res) +{ + return ERR_PTR(-EINVAL); +} + +static inline +void __iomem *devm_ioremap_resource_wc(struct device *dev, + const struct resource *res) +{ + return ERR_PTR(-EINVAL); +} + +static inline +void __iomem *devm_of_iomap(struct device *dev, + struct device_node *node, int index, + resource_size_t *size) +{ + return ERR_PTR(-EINVAL); +} + +#endif /* allows to add/remove a custom action to devres stack */ void devm_remove_action(struct device *dev, void (*action)(void *), void *data); diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index 6802596b017c..e9910b41d48e 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -201,8 +201,9 @@ struct iio_dev * @chan: The channel being queried. * @val: Value read back. * - * Note raw reads from iio channels are in adc counts and hence - * scale will need to be applied if standard units required. + * Note, if standard units are required, raw reads from iio channels + * need the offset (default 0) and scale (default 1) to be applied + * as (raw + offset) * scale. */ int iio_read_channel_raw(struct iio_channel *chan, int *val); @@ -212,8 +213,9 @@ int iio_read_channel_raw(struct iio_channel *chan, * @chan: The channel being queried. * @val: Value read back. * - * Note raw reads from iio channels are in adc counts and hence - * scale will need to be applied if standard units required. + * Note, if standard units are required, raw reads from iio channels + * need the offset (default 0) and scale (default 1) to be applied + * as (raw + offset) * scale. * * In opposit to the normal iio_read_channel_raw this function * returns the average of multiple reads. @@ -281,8 +283,9 @@ int iio_read_channel_attribute(struct iio_channel *chan, int *val, * @chan: The channel being queried. * @val: Value being written. * - * Note raw writes to iio channels are in dac counts and hence - * scale will need to be applied if standard units required. + * Note that for raw writes to iio channels, if the value provided is + * in standard units, the affect of the scale and offset must be removed + * as (value / scale) - offset. */ int iio_write_channel_raw(struct iio_channel *chan, int val); @@ -292,12 +295,25 @@ int iio_write_channel_raw(struct iio_channel *chan, int val); * @chan: The channel being queried. * @val: Value read back. * - * Note raw reads from iio channels are in adc counts and hence - * scale will need to be applied if standard units are required. + * Note, if standard units are required, raw reads from iio channels + * need the offset (default 0) and scale (default 1) to be applied + * as (raw + offset) * scale. */ int iio_read_max_channel_raw(struct iio_channel *chan, int *val); /** + * iio_read_min_channel_raw() - read minimum available raw value from a given + * channel, i.e. the minimum possible value. + * @chan: The channel being queried. + * @val: Value read back. + * + * Note, if standard units are required, raw reads from iio channels + * need the offset (default 0) and scale (default 1) to be applied + * as (raw + offset) * scale. + */ +int iio_read_min_channel_raw(struct iio_channel *chan, int *val); + +/** * iio_read_avail_channel_raw() - read available raw values from a given channel * @chan: The channel being queried. * @vals: Available values read back. @@ -308,8 +324,9 @@ int iio_read_max_channel_raw(struct iio_channel *chan, int *val); * For ranges, three vals are always returned; min, step and max. * For lists, all the possible values are enumerated. * - * Note raw available values from iio channels are in adc counts and - * hence scale will need to be applied if standard units are required. + * Note, if standard units are required, raw available values from iio + * channels need the offset (default 0) and scale (default 1) to be applied + * as (raw + offset) * scale. */ int iio_read_avail_channel_raw(struct iio_channel *chan, const int **vals, int *length); diff --git a/include/linux/int_log.h b/include/linux/int_log.h new file mode 100644 index 000000000000..0a6f58c38b61 --- /dev/null +++ b/include/linux/int_log.h @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Provides fixed-point logarithm operations. + * + * Copyright (C) 2006 Christoph Pfister (christophpfister@gmail.com) + */ + +#ifndef __LINUX_INT_LOG_H +#define __LINUX_INT_LOG_H + +#include <linux/types.h> + +/** + * intlog2 - computes log2 of a value; the result is shifted left by 24 bits + * + * @value: The value (must be != 0) + * + * to use rational values you can use the following method: + * + * intlog2(value) = intlog2(value * 2^x) - x * 2^24 + * + * Some usecase examples: + * + * intlog2(8) will give 3 << 24 = 3 * 2^24 + * + * intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24 + * + * intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24 + * + * + * return: log2(value) * 2^24 + */ +extern unsigned int intlog2(u32 value); + +/** + * intlog10 - computes log10 of a value; the result is shifted left by 24 bits + * + * @value: The value (must be != 0) + * + * to use rational values you can use the following method: + * + * intlog10(value) = intlog10(value * 10^x) - x * 2^24 + * + * An usecase example: + * + * intlog10(1000) will give 3 << 24 = 3 * 2^24 + * + * due to the implementation intlog10(1000) might be not exactly 3 * 2^24 + * + * look at intlog2 for similar examples + * + * return: log10(value) * 2^24 + */ +extern unsigned int intlog10(u32 value); + +#endif diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index d860499e15e4..44c298aa58d4 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -614,12 +614,6 @@ struct transaction_s struct journal_head *t_checkpoint_list; /* - * Doubly-linked circular list of all buffers submitted for IO while - * checkpointing. [j_list_lock] - */ - struct journal_head *t_checkpoint_io_list; - - /* * Doubly-linked circular list of metadata buffers being * shadowed by log IO. The IO buffers on the iobuf list and * the shadow buffers on this list match each other one for @@ -1449,6 +1443,7 @@ extern void jbd2_journal_commit_transaction(journal_t *); void __jbd2_journal_clean_checkpoint_list(journal_t *journal, bool destroy); unsigned long jbd2_journal_shrink_checkpoint_list(journal_t *journal, unsigned long *nr_to_scan); int __jbd2_journal_remove_checkpoint(struct journal_head *); +int jbd2_journal_try_remove_checkpoint(struct journal_head *jh); void jbd2_journal_destroy_checkpoint(journal_t *journal); void __jbd2_journal_insert_checkpoint(struct journal_head *, transaction_t *); diff --git a/include/linux/minmax.h b/include/linux/minmax.h index 396df1121bff..798c6963909f 100644 --- a/include/linux/minmax.h +++ b/include/linux/minmax.h @@ -133,6 +133,70 @@ */ #define max_t(type, x, y) __careful_cmp((type)(x), (type)(y), >) +/* + * Remove a const qualifier from integer types + * _Generic(foo, type-name: association, ..., default: association) performs a + * comparison against the foo type (not the qualified type). + * Do not use the const keyword in the type-name as it will not match the + * unqualified type of foo. + */ +#define __unconst_integer_type_cases(type) \ + unsigned type: (unsigned type)0, \ + signed type: (signed type)0 + +#define __unconst_integer_typeof(x) typeof( \ + _Generic((x), \ + char: (char)0, \ + __unconst_integer_type_cases(char), \ + __unconst_integer_type_cases(short), \ + __unconst_integer_type_cases(int), \ + __unconst_integer_type_cases(long), \ + __unconst_integer_type_cases(long long), \ + default: (x))) + +/* + * Do not check the array parameter using __must_be_array(). + * In the following legit use-case where the "array" passed is a simple pointer, + * __must_be_array() will return a failure. + * --- 8< --- + * int *buff + * ... + * min = min_array(buff, nb_items); + * --- 8< --- + * + * The first typeof(&(array)[0]) is needed in order to support arrays of both + * 'int *buff' and 'int buff[N]' types. + * + * The array can be an array of const items. + * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order + * to discard the const qualifier for the __element variable. + */ +#define __minmax_array(op, array, len) ({ \ + typeof(&(array)[0]) __array = (array); \ + typeof(len) __len = (len); \ + __unconst_integer_typeof(__array[0]) __element = __array[--__len]; \ + while (__len--) \ + __element = op(__element, __array[__len]); \ + __element; }) + +/** + * min_array - return minimum of values present in an array + * @array: array + * @len: array length + * + * Note that @len must not be zero (empty array). + */ +#define min_array(array, len) __minmax_array(min, array, len) + +/** + * max_array - return maximum of values present in an array + * @array: array + * @len: array length + * + * Note that @len must not be zero (empty array). + */ +#define max_array(array, len) __minmax_array(max, array, len) + /** * clamp_t - return a value clamped to a given range using a given type * @type: the type of variable to use diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index b845fd83f429..7a41c72c1959 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -63,6 +63,8 @@ extern struct resource *platform_get_mem_or_io(struct platform_device *, extern struct device * platform_find_device_by_driver(struct device *start, const struct device_driver *drv); + +#ifdef CONFIG_HAS_IOMEM extern void __iomem * devm_platform_get_and_ioremap_resource(struct platform_device *pdev, unsigned int index, struct resource **res); @@ -72,6 +74,32 @@ devm_platform_ioremap_resource(struct platform_device *pdev, extern void __iomem * devm_platform_ioremap_resource_byname(struct platform_device *pdev, const char *name); +#else + +static inline void __iomem * +devm_platform_get_and_ioremap_resource(struct platform_device *pdev, + unsigned int index, struct resource **res) +{ + return ERR_PTR(-EINVAL); +} + + +static inline void __iomem * +devm_platform_ioremap_resource(struct platform_device *pdev, + unsigned int index) +{ + return ERR_PTR(-EINVAL); +} + +static inline void __iomem * +devm_platform_ioremap_resource_byname(struct platform_device *pdev, + const char *name) +{ + return ERR_PTR(-EINVAL); +} + +#endif + extern int platform_get_irq(struct platform_device *, unsigned int); extern int platform_get_irq_optional(struct platform_device *, unsigned int); extern int platform_irq_count(struct platform_device *); diff --git a/include/linux/tcp.h b/include/linux/tcp.h index b4c08ac86983..91a37c99ba66 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -513,7 +513,7 @@ static inline void fastopen_queue_tune(struct sock *sk, int backlog) struct request_sock_queue *queue = &inet_csk(sk)->icsk_accept_queue; int somaxconn = READ_ONCE(sock_net(sk)->core.sysctl_somaxconn); - queue->fastopenq.max_qlen = min_t(unsigned int, backlog, somaxconn); + WRITE_ONCE(queue->fastopenq.max_qlen, min_t(unsigned int, backlog, somaxconn)); } static inline void tcp_move_syn(struct tcp_sock *tp, |