lib/string_helpers.c:string_get_size(): remove redundant prefixes

While commit 3c9f3681d0b4 ("[SCSI] lib: add generic helper to print
sizes rounded to the correct SI range") says that Z and Y are included
in preparation for 128 bit computers, they just waste .text currently.
If and when we get u128, string_get_size needs updating anyway (and ISO
needs to come up with four more prefixes).

Also there's no need to include and test for the NULL sentinel; once we
reach "E" size is at most 18.  [The test is also wrong; it should be
units_str[units][i+1]; if we've reached NULL we're already doomed.]

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/lib/string_helpers.c b/lib/string_helpers.c
index 58b78ba57439..0d25f7aa732c 100644
--- a/lib/string_helpers.c
+++ b/lib/string_helpers.c
@@ -28,11 +28,10 @@ int string_get_size(u64 size, const enum string_size_units units,
                     char *buf, int len)
 {
         static const char *const units_10[] = {
-                "B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB", NULL
+                "B", "kB", "MB", "GB", "TB", "PB", "EB"
         };
         static const char *const units_2[] = {
-                "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB",
-                NULL
+                "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"
         };
         static const char *const *const units_str[] = {
                 [STRING_UNITS_10] = units_10,
@@ -49,7 +48,7 @@ int string_get_size(u64 size, const enum string_size_units units,
         tmp[0] = '\0';
         i = 0;
         if (size >= divisor[units]) {
-                while (size >= divisor[units] && units_str[units][i]) {
+                while (size >= divisor[units]) {
                         remainder = do_div(size, divisor[units]);
                         i++;
                 }