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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2025-04-20 10:18:30 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2025-04-20 10:18:30 +0200
commit9b249e60a5a83f49f2a65bfb808c0c058ff12a61 (patch)
tree85d9e3b58cf86bd15533dee4be6d7fb24981e801 /include/linux/syscalls.h
parent834e602d0cc7c743bfce734fad4a46cefc0f9ab1 (diff)
downloadkernel-linux-6.13.y.tar.gz
Linux 6.13.12linux-6.13.y
Link: https://lore.kernel.org/r/20250417175111.386381660@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Link: https://lore.kernel.org/r/20250418110411.049004302@linuxfoundation.org Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Shuah Khan <skhan@linuxfoundation.org> Tested-by: SeongJae Park <sj@kernel.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/syscalls.h')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.46.0) at 2026-07-15 07:44:22 +0000
-05mm/page_reporting: fix MAX_ORDER usage in page_reporting_register()Kirill A. Shutemov MAX_ORDER is not inclusive: the maximum allocation order buddy allocator can deliver is MAX_ORDER-1. Fix MAX_ORDER usage in page_reporting_register(). Link: https://lkml.kernel.org/r/20230315113133.11326-8-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 2023-01-18mm/page_reporting: replace rcu_access_pointer() with rcu_dereference_protected()SeongJae Park Page reporting fetches pr_dev_info using rcu_access_pointer(), which is for safely fetching a pointer that will not be dereferenced but could concurrently updated. The code indeed does not dereference pr_dev_info after fetching it using rcu_access_pointer(), but it fetches the pointer while concurrent updates to the pointer is avoided by holding the update side lock, page_reporting_mutex. In the case, rcu_dereference_protected() should be used instead because it provides better readability and performance on some cases, as rcu_dereference_protected() avoids use of READ_ONCE(). Replace the rcu_access_pointer() calls with rcu_dereference_protected(). Link: https://lkml.kernel.org/r/20221228175942.149491-1-sj@kernel.org Fixes: 36e66c554b5c ("mm: introduce Reported pages") Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 2022-11-28mm/page_reporting: Add checks for page_reporting_order paramShradha Gupta Current code allows the page_reporting_order parameter to be changed via sysfs to any integer value. The new value is used immediately in page reporting code with no validation, which could cause incorrect behavior. Fix this by adding validation of the new value. Export this parameter for use in the driver that is calling the page_reporting_register(). This is needed by drivers like hv_balloon to know the order of the pages reported. Traditionally the values provided in the kernel boot line or subsequently changed via sysfs take priority therefore, if page_reporting_order parameter's value is set, it takes precedence over the value passed while registering with the driver. Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> Link: https://lore.kernel.org/r/1664517699-1085-2-git-send-email-shradhagupta@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>