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authorJason Wessel <jason.wessel@windriver.com>2010-01-07 12:58:36 -0500
committerJason Wessel <jason.wessel@windriver.com>2010-01-07 12:58:36 -0500
commit6144a85a0e018c19bc4b24f7eb6c1f3f7431813d (patch)
tree4300bb5d23338884a75d449f17f2538815ac9f8c /include/linux/uaccess.h
parent2c1f1895ef2aa8f0e5497893eff71304aef332e1 (diff)
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>
Diffstat (limited to 'include/linux/uaccess.h')
-rw-r--r--include/linux/uaccess.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 6b58367d145e..d512d98dfb7d 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -94,6 +94,7 @@ static inline unsigned long __copy_from_user_nocache(void *to,
94 * happens, handle that and return -EFAULT. 94 * happens, handle that and return -EFAULT.
95 */ 95 */
96extern long probe_kernel_read(void *dst, void *src, size_t size); 96extern long probe_kernel_read(void *dst, void *src, size_t size);
97extern long __probe_kernel_read(void *dst, void *src, size_t size);
97 98
98/* 99/*
99 * probe_kernel_write(): safely attempt to write to a location 100 * probe_kernel_write(): safely attempt to write to a location
@@ -104,6 +105,7 @@ extern long probe_kernel_read(void *dst, void *src, size_t size);
104 * Safely write to address @dst from the buffer at @src. If a kernel fault 105 * Safely write to address @dst from the buffer at @src. If a kernel fault
105 * happens, handle that and return -EFAULT. 106 * happens, handle that and return -EFAULT.
106 */ 107 */
107extern long probe_kernel_write(void *dst, void *src, size_t size); 108extern long notrace probe_kernel_write(void *dst, void *src, size_t size);
109extern long notrace __probe_kernel_write(void *dst, void *src, size_t size);
108 110
109#endif /* __LINUX_UACCESS_H__ */ 111#endif /* __LINUX_UACCESS_H__ */