[PATCH] i386: Update __copy_to_user_inatomic linuxdoc description
Explicity specify that the caller should pin the user memory otherwise the function will sleep Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@gmail.com> Signed-off-by: Andi Kleen <ak@suse.de>
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@ -397,7 +397,19 @@ unsigned long __must_check __copy_from_user_ll_nocache(void *to,
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unsigned long __must_check __copy_from_user_ll_nocache_nozero(void *to,
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const void __user *from, unsigned long n);
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/*
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/**
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* __copy_to_user_inatomic: - Copy a block of data into user space, with less checking.
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* @to: Destination address, in user space.
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* @from: Source address, in kernel space.
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* @n: Number of bytes to copy.
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*
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* Context: User context only.
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*
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* Copy data from kernel space to user space. Caller must check
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* the specified block with access_ok() before calling this function.
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* The caller should also make sure he pins the user space address
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* so that the we don't result in page fault and sleep.
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*
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* Here we special-case 1, 2 and 4-byte copy_*_user invocations. On a fault
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* we return the initial request size (1, 2 or 4), as copy_*_user should do.
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* If a store crosses a page boundary and gets a fault, the x86 will not write
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