linux-kernel - Re: [PATCH v9 09/13] exfat: add misc operations

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Date:   Thu, 09 Jan 2020 17:04:15 -0500
From:   "Valdis Klētnieks" <valdis.kletnieks@...il.com>
To:     Namjae Jeon <namjae.jeon@...sung.com>
cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        gregkh@...uxfoundation.org, hch@....de, sj1557.seo@...sung.com,
        linkinjeon@...il.com, tytso@....edu
Subject: Re: [PATCH v9 09/13] exfat: add misc operations

When compiling on a 32-bit system like Raspian on an RPi4, the compile dies:

  CC [M]  fs/exfat/misc.o
fs/exfat/misc.c: In function 'exfat_time_unix2fat':
fs/exfat/misc.c:157:16: error: 'UNIX_SECS_2108' undeclared (first use in this function); did you mean 'UNIX_SECS_1980'?
  if (second >= UNIX_SECS_2108) {
                ^~~~~~~~~~~~~~
                UNIX_SECS_1980
fs/exfat/misc.c:157:16: note: each undeclared identifier is reported only once for each function it appears in
make[2]: *** [scripts/Makefile.build:266: fs/exfat/misc.o] Error 1

The problem is that the definition of UNIX_SECS_2108  is wrapped:

+#if BITS_PER_LONG == 64
+#define UNIX_SECS_2108    4354819200L
+#endif

but the usage isn't.