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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
maccess,probe_kernel: Allow arch specific override probe_kernel_(read|write)
Some archs such as blackfin, would like to have an arch specific
probe_kernel_read() and probe_kernel_write() implementation which can
fall back to the generic implementation if no special operations are
needed.
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
+12
-3
+3
-1
include/linux/uaccess.h
+3
-1
include/linux/uaccess.h
···
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* happens, handle that and return -EFAULT.
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*/
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extern long probe_kernel_read(void *dst, void *src, size_t size);
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+
extern long __probe_kernel_read(void *dst, void *src, size_t size);
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/*
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* probe_kernel_write(): safely attempt to write to a location
···
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* Safely write to address @dst from the buffer at @src. If a kernel fault
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* happens, handle that and return -EFAULT.
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*/
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-
extern long probe_kernel_write(void *dst, void *src, size_t size);
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+
extern long notrace probe_kernel_write(void *dst, void *src, size_t size);
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extern long notrace __probe_kernel_write(void *dst, void *src, size_t size);
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#endif /* __LINUX_UACCESS_H__ */
+9
-2
mm/maccess.c
+9
-2
mm/maccess.c
···
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* Safely read from address @src to the buffer at @dst. If a kernel fault
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* happens, handle that and return -EFAULT.
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*/
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-
long probe_kernel_read(void *dst, void *src, size_t size)
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+
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long __weak probe_kernel_read(void *dst, void *src, size_t size)
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__attribute__((alias("__probe_kernel_read")));
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+
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long __probe_kernel_read(void *dst, void *src, size_t size)
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{
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long ret;
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mm_segment_t old_fs = get_fs();
···
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* Safely write to address @dst from the buffer at @src. If a kernel fault
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* happens, handle that and return -EFAULT.
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*/
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-
long notrace __weak probe_kernel_write(void *dst, void *src, size_t size)
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+
long __weak probe_kernel_write(void *dst, void *src, size_t size)
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__attribute__((alias("__probe_kernel_write")));
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+
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long __probe_kernel_write(void *dst, void *src, size_t size)
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{
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long ret;
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mm_segment_t old_fs = get_fs();