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014a5c107d
Patch series "hexagon: Fix up instances of -Wmissing-prototypes".
This series fixes all the instances of -Wmissing-prototypes in
arch/hexagon, as it is about to be enabled globally in a default build.
This patch (of 19):
Clang warns:
arch/hexagon/mm/uaccess.c:39:15: warning: no previous prototype for function 'clear_user_hexagon' [-Wmissing-prototypes]
39 | unsigned long clear_user_hexagon(void __user *dest, unsigned long count)
| ^
arch/hexagon/mm/uaccess.c:39:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
39 | unsigned long clear_user_hexagon(void __user *dest, unsigned long count)
| ^
| static
1 warning generated.
This function appears to have been unused since it was introduced in
commit 7567746e1c ("Hexagon: Add user access functions"), so remove it.
Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-0-5c34714afe9e@kernel.org
Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-1-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Brian Cain <bcain@quicinc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
38 lines
999 B
C
38 lines
999 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
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*/
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/*
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* Support for user memory access from kernel. This will
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* probably be inlined for performance at some point, but
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* for ease of debug, and to a lesser degree for code size,
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* we implement here as subroutines.
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*/
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#include <linux/types.h>
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#include <linux/uaccess.h>
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#include <linux/pgtable.h>
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/*
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* For clear_user(), exploit previously defined copy_to_user function
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* and the fact that we've got a handy zero page defined in kernel/head.S
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*
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* dczero here would be even faster.
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*/
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__kernel_size_t __clear_user_hexagon(void __user *dest, unsigned long count)
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{
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long uncleared;
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while (count > PAGE_SIZE) {
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uncleared = raw_copy_to_user(dest, &empty_zero_page, PAGE_SIZE);
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if (uncleared)
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return count - (PAGE_SIZE - uncleared);
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count -= PAGE_SIZE;
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dest += PAGE_SIZE;
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}
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if (count)
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count = raw_copy_to_user(dest, &empty_zero_page, count);
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return count;
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}
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