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ntsync: Introduce NTSYNC_IOC_SEM_POST.

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This corresponds to the NT syscall NtReleaseSemaphore().

This increases the semaphore's internal counter by the given value, and returns
the previous value. If the counter would overflow the defined maximum, the
function instead fails and returns -EOVERFLOW.

Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://lore.kernel.org/r/20240329000621.148791-4-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Elizabeth Figura
2024-03-28 19:05:54 -05:00
committed by Greg Kroah-Hartman
parent b46271ec40
commit dc806bd48a
2 changed files with 71 additions and 3 deletions
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include/uapi/linux/ntsync.h
+2
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@@ -18,4 +18,6 @@ struct ntsync_sem_args {
#define NTSYNC_IOC_CREATE_SEM _IOWR('N', 0x80, struct ntsync_sem_args)
#define NTSYNC_IOC_SEM_POST _IOWR('N', 0x81, __u32)
#endif