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| author | John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> | 2020-06-11 09:58:11 +0200 |
|---|---|---|
| committer | Rich Felker <dalias@libc.org> | 2020-08-14 22:05:04 -0400 |
| commit | 2d2b308a8b7d0aeeadeabd8d7f329bb8200f2e2b (patch) | |
| tree | eb3d9096b05a637ff220788dfa8c6541a171b4db /arch/sh | |
| parent | 2202d81b098ef776153c6b40c5404d486042a3ed (diff) | |
| download | linux-2d2b308a8b7d0aeeadeabd8d7f329bb8200f2e2b.tar.gz linux-2d2b308a8b7d0aeeadeabd8d7f329bb8200f2e2b.tar.bz2 linux-2d2b308a8b7d0aeeadeabd8d7f329bb8200f2e2b.zip | |
sh: Implement __get_user_u64() required for 64-bit get_user()
Trying to build the kernel with CONFIG_INFINIBAND_USER_ACCESS enabled fails
ERROR: "__get_user_unknown" [drivers/infiniband/core/ib_uverbs.ko] undefined!
with on SH since the kernel misses a 64-bit implementation of get_user().
Implement the missing 64-bit get_user() as __get_user_u64(), matching the
already existing __put_user_u64() which implements the 64-bit put_user().
Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Acked-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Rich Felker <dalias@libc.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/include/asm/uaccess_32.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/sh/include/asm/uaccess_32.h b/arch/sh/include/asm/uaccess_32.h index 624cf55acc27..5d7ddc092afd 100644 --- a/arch/sh/include/asm/uaccess_32.h +++ b/arch/sh/include/asm/uaccess_32.h @@ -26,6 +26,9 @@ do { \ case 4: \ __get_user_asm(x, ptr, retval, "l"); \ break; \ + case 8: \ + __get_user_u64(x, ptr, retval); \ + break; \ default: \ __get_user_unknown(); \ break; \ @@ -66,6 +69,56 @@ do { \ extern void __get_user_unknown(void); +#if defined(CONFIG_CPU_LITTLE_ENDIAN) +#define __get_user_u64(x, addr, err) \ +({ \ +__asm__ __volatile__( \ + "1:\n\t" \ + "mov.l %2,%R1\n\t" \ + "mov.l %T2,%S1\n\t" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "mov #0,%R1\n\t" \ + "mov #0,%S1\n\t" \ + "mov.l 4f, %0\n\t" \ + "jmp @%0\n\t" \ + " mov %3, %0\n\t" \ + ".balign 4\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".long 1b + 2, 3b\n\t" \ + ".previous" \ + :"=&r" (err), "=&r" (x) \ + :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); }) +#else +#define __get_user_u64(x, addr, err) \ +({ \ +__asm__ __volatile__( \ + "1:\n\t" \ + "mov.l %2,%S1\n\t" \ + "mov.l %T2,%R1\n\t" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "mov #0,%S1\n\t" \ + "mov #0,%R1\n\t" \ + "mov.l 4f, %0\n\t" \ + "jmp @%0\n\t" \ + " mov %3, %0\n\t" \ + ".balign 4\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".long 1b + 2, 3b\n\t" \ + ".previous" \ + :"=&r" (err), "=&r" (x) \ + :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); }) +#endif + #define __put_user_size(x,ptr,size,retval) \ do { \ retval = 0; \ |