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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/staging/android/ashmem.h
..
..
@@ -21,4 +21,6 @@
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 #define COMPAT_ASHMEM_SET_PROT_MASK	_IOW(__ASHMEMIOC, 5, unsigned int)
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 #endif
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+int is_ashmem_file(struct file *file);
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+
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 #endif	/* _LINUX_ASHMEM_H */