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mm: move is_kernel_rodata() to asm-generic/sections.h

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Export this routine so that we can use it later in devm_kstrdup_const()
and devm_kfree().

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bartosz Golaszewski 2018-10-14 17:20:08 +02:00 committed by Greg Kroah-Hartman
parent 0571967dfb
commit 59c3f82ad1
2 changed files with 14 additions and 7 deletions
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14
include/asm-generic/sections.h
View File

@ -141,4 +141,18 @@ static inline bool init_section_intersects(void *virt, size_t size)
return memory_intersects(__init_begin, __init_end, virt, size);
}
/**
* is_kernel_rodata - checks if the pointer address is located in the
* .rodata section
*
* @addr: address to check
*
* Returns: true if the address is located in .rodata, false otherwise.
*/
static inline bool is_kernel_rodata(unsigned long addr)
{
return addr >= (unsigned long)__start_rodata &&
addr < (unsigned long)__end_rodata;
}
#endif /* _ASM_GENERIC_SECTIONS_H_ */

7
mm/util.c
View File

@ -15,17 +15,10 @@
#include <linux/vmalloc.h>
#include <linux/userfaultfd_k.h>
#include <asm/sections.h>
#include <linux/uaccess.h>
#include "internal.h"
static inline int is_kernel_rodata(unsigned long addr)
{
return addr >= (unsigned long)__start_rodata &&
addr < (unsigned long)__end_rodata;
}
/**
* kfree_const - conditionally free memory
* @x: pointer to the memory