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2f3577d16c
Patch series "selftest/mm: Remove warnings found by adding compiler flags". Recently, I reviewed a patch on the mm/kselftest mailing list about a test which had obvious type mismatch fix in it. It was strange why that wasn't caught during development and when patch was accepted. This led me to discover that those extra compiler options to catch these warnings aren't being used. When I added them, I found tens of warnings in just mm suite. In this series, I'm fixing those warnings in a few files. More fixes will be sent later. This patch (of 4): Remove cost from the return type as it is ignored anyways and generates the warning: warning: type qualifiers ignored on function return type [-Wignored-qualifiers] Link: https://lkml.kernel.org/r/20241209185624.2245158-1-usama.anjum@collabora.com Link: https://lkml.kernel.org/r/20241209185624.2245158-2-usama.anjum@collabora.com Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Cc: David Hildenbrand <david@redhat.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __THP_SETTINGS_H__
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#define __THP_SETTINGS_H__
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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enum thp_enabled {
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THP_NEVER,
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THP_ALWAYS,
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THP_INHERIT,
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THP_MADVISE,
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};
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enum thp_defrag {
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THP_DEFRAG_ALWAYS,
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THP_DEFRAG_DEFER,
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THP_DEFRAG_DEFER_MADVISE,
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THP_DEFRAG_MADVISE,
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THP_DEFRAG_NEVER,
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};
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enum shmem_enabled {
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SHMEM_NEVER,
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SHMEM_ALWAYS,
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SHMEM_WITHIN_SIZE,
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SHMEM_ADVISE,
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SHMEM_INHERIT,
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SHMEM_DENY,
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SHMEM_FORCE,
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};
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#define NR_ORDERS 20
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struct hugepages_settings {
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enum thp_enabled enabled;
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};
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struct khugepaged_settings {
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bool defrag;
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unsigned int alloc_sleep_millisecs;
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unsigned int scan_sleep_millisecs;
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unsigned int max_ptes_none;
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unsigned int max_ptes_swap;
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unsigned int max_ptes_shared;
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unsigned long pages_to_scan;
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};
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struct shmem_hugepages_settings {
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enum shmem_enabled enabled;
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};
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struct thp_settings {
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enum thp_enabled thp_enabled;
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enum thp_defrag thp_defrag;
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enum shmem_enabled shmem_enabled;
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bool use_zero_page;
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struct khugepaged_settings khugepaged;
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unsigned long read_ahead_kb;
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struct hugepages_settings hugepages[NR_ORDERS];
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struct shmem_hugepages_settings shmem_hugepages[NR_ORDERS];
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};
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int read_file(const char *path, char *buf, size_t buflen);
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int write_file(const char *path, const char *buf, size_t buflen);
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unsigned long read_num(const char *path);
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void write_num(const char *path, unsigned long num);
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int thp_read_string(const char *name, const char * const strings[]);
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void thp_write_string(const char *name, const char *val);
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unsigned long thp_read_num(const char *name);
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void thp_write_num(const char *name, unsigned long num);
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void thp_write_settings(struct thp_settings *settings);
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void thp_read_settings(struct thp_settings *settings);
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struct thp_settings *thp_current_settings(void);
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void thp_push_settings(struct thp_settings *settings);
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void thp_pop_settings(void);
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void thp_restore_settings(void);
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void thp_save_settings(void);
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void thp_set_read_ahead_path(char *path);
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unsigned long thp_supported_orders(void);
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unsigned long thp_shmem_supported_orders(void);
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#endif /* __THP_SETTINGS_H__ */
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