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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-19 11:06:50 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-04-03 21:22:18 +1100 |
| commit | fb05121fd6a20f0830ff2a4420c51af6ca4ac6e7 (patch) | |
| tree | 60661671efe604c38eef1f701e04aeb6b4236c7e /include/linux/uaccess.h | |
| parent | 5cd29b1fd3e8f2b45fe6d011588d832417defe31 (diff) | |
signal: Add unsafe_get_compat_sigset()
In the same way as commit 14026b94ccfe ("signal: Add
unsafe_put_compat_sigset()"), this time add
unsafe_get_compat_sigset() macro which is the 'unsafe'
version of get_compat_sigset()
For the bigendian, use unsafe_get_user() directly
to avoid intermediate copy through the stack.
For the littleendian, use a straight unsafe_copy_from_user().
This commit adds the generic fallback for unsafe_copy_from_user().
Architectures wanting to use unsafe_get_compat_sigset() have to
make sure they have their own unsafe_copy_from_user().
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b05bf434ee13c76bc9df5f02653a10db5e7b54e5.1616151715.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'include/linux/uaccess.h')
| -rw-r--r-- | include/linux/uaccess.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index c7c6e8b8344d..c05e903cef02 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -397,6 +397,7 @@ long strnlen_user_nofault(const void __user *unsafe_addr, long count); #define unsafe_get_user(x,p,e) unsafe_op_wrap(__get_user(x,p),e) #define unsafe_put_user(x,p,e) unsafe_op_wrap(__put_user(x,p),e) #define unsafe_copy_to_user(d,s,l,e) unsafe_op_wrap(__copy_to_user(d,s,l),e) +#define unsafe_copy_from_user(d,s,l,e) unsafe_op_wrap(__copy_from_user(d,s,l),e) static inline unsigned long user_access_save(void) { return 0UL; } static inline void user_access_restore(unsigned long flags) { } #endif |