[PATCH 4/4] riscv: __asm_copy_to-from_user: Fix: Typos in comments

From: Akira Tsukamoto
Date: Tue Jul 20 2021 - 04:57:40 EST



Fixing typos and grammar mistakes and using more intuitive label
name.

Signed-off-by: Akira Tsukamoto <akira.tsukamoto@xxxxxxxxx>
---
arch/riscv/lib/uaccess.S | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/riscv/lib/uaccess.S b/arch/riscv/lib/uaccess.S
index 54d497a03164..63bc691cff91 100644
--- a/arch/riscv/lib/uaccess.S
+++ b/arch/riscv/lib/uaccess.S
@@ -33,19 +33,20 @@ ENTRY(__asm_copy_from_user)

/*
* Use byte copy only if too small.
+ * SZREG holds 4 for RV32 and 8 for RV64
*/
li a3, 9*SZREG /* size must be larger than size in word_copy */
bltu a2, a3, .Lbyte_copy_tail

/*
- * Copy first bytes until dst is align to word boundary.
+ * Copy first bytes until dst is aligned to word boundary.
* a0 - start of dst
* t1 - start of aligned dst
*/
addi t1, a0, SZREG-1
andi t1, t1, ~(SZREG-1)
/* dst is already aligned, skip */
- beq a0, t1, .Lskip_first_bytes
+ beq a0, t1, .Lskip_align_dst
1:
/* a5 - one byte for copying data */
fixup lb a5, 0(a1), 10f
@@ -54,7 +55,7 @@ ENTRY(__asm_copy_from_user)
addi a0, a0, 1 /* dst */
bltu a0, t1, 1b /* t1 - start of aligned dst */

-.Lskip_first_bytes:
+.Lskip_align_dst:
/*
* Now dst is aligned.
* Use shift-copy if src is misaligned.
@@ -71,7 +72,6 @@ ENTRY(__asm_copy_from_user)
*
* a0 - start of aligned dst
* a1 - start of aligned src
- * a3 - a1 & mask:(SZREG-1)
* t0 - end of aligned dst
*/
addi t0, t0, -(8*SZREG) /* not to over run */
@@ -106,7 +106,7 @@ ENTRY(__asm_copy_from_user)
* For misaligned copy we still perform aligned word copy, but
* we need to use the value fetched from the previous iteration and
* do some shifts.
- * This is safe because reading less than a word size.
+ * This is safe because reading is less than a word size.
*
* a0 - start of aligned dst
* a1 - start of src
@@ -116,7 +116,7 @@ ENTRY(__asm_copy_from_user)
*/
/* calculating aligned word boundary for dst */
andi t1, t0, ~(SZREG-1)
- /* Converting unaligned src to aligned arc */
+ /* Converting unaligned src to aligned src */
andi a1, a1, ~(SZREG-1)

/*
@@ -128,7 +128,7 @@ ENTRY(__asm_copy_from_user)
li a5, SZREG*8
sub t4, a5, t3

- /* Load the first word to combine with seceond word */
+ /* Load the first word to combine with second word */
fixup REG_L a5, 0(a1), 10f

3:
@@ -160,7 +160,7 @@ ENTRY(__asm_copy_from_user)
* a1 - start of remaining src
* t0 - end of remaining dst
*/
- bgeu a0, t0, 5f
+ bgeu a0, t0, .Lout_copy_user /* check if end of copy */
4:
fixup lb a5, 0(a1), 10f
addi a1, a1, 1 /* src */
@@ -168,7 +168,7 @@ ENTRY(__asm_copy_from_user)
addi a0, a0, 1 /* dst */
bltu a0, t0, 4b /* t0 - end of dst */

-5:
+.Lout_copy_user:
/* Disable access to user memory */
csrc CSR_STATUS, t6
li a0, 0
--
2.17.1