sections: fix const sections for crc32 table

Fix the const sections for the code generated by crc32 table.  There's no
ro version of the cacheline aligned section, so we cannot put in const
data without a conflict Just don't make the crc tables const for now.

[ak@linux.intel.com: some fixes and new description]
Signed-off-by: Joe Mario <jmario@redhat.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/lib/crc32.c b/lib/crc32.c
index 61774b8db4de6911453ccd383df7d38dd2f2b42f..072fbd8234d56f531a25dbf4a6dcb53f6463eb7d 100644 (file)
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -188,11 +188,13 @@ u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)
 #else
 u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
 {
-       return crc32_le_generic(crc, p, len, crc32table_le, CRCPOLY_LE);
+       return crc32_le_generic(crc, p, len,
+                       (const u32 (*)[256])crc32table_le, CRCPOLY_LE);
 }
 u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)
 {
-       return crc32_le_generic(crc, p, len, crc32ctable_le, CRC32C_POLY_LE);
+       return crc32_le_generic(crc, p, len,
+                       (const u32 (*)[256])crc32ctable_le, CRC32C_POLY_LE);
 }
 #endif
 EXPORT_SYMBOL(crc32_le);
@@ -253,7 +255,8 @@ u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
 #else
 u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
 {
-       return crc32_be_generic(crc, p, len, crc32table_be, CRCPOLY_BE);
+       return crc32_be_generic(crc, p, len,
+                       (const u32 (*)[256])crc32table_be, CRCPOLY_BE);
 }
 #endif
 EXPORT_SYMBOL(crc32_be);

diff --git a/lib/gen_crc32table.c b/lib/gen_crc32table.c
index 8f8d5439e2d9c59d373f01e9bb507f3f41433ef0..75fac57a12ba3dfe70deb71334dc16ed593f48ee 100644 (file)
--- a/lib/gen_crc32table.c
+++ b/lib/gen_crc32table.c
@@ -109,7 +109,7 @@ int main(int argc, char** argv)
 
        if (CRC_LE_BITS > 1) {
                crc32init_le();
-               printf("static const u32 __cacheline_aligned "
+               printf("static u32 __cacheline_aligned "
                       "crc32table_le[%d][%d] = {",
                       LE_TABLE_ROWS, LE_TABLE_SIZE);
                output_table(crc32table_le, LE_TABLE_ROWS,
@@ -119,7 +119,7 @@ int main(int argc, char** argv)
 
        if (CRC_BE_BITS > 1) {
                crc32init_be();
-               printf("static const u32 __cacheline_aligned "
+               printf("static u32 __cacheline_aligned "
                       "crc32table_be[%d][%d] = {",
                       BE_TABLE_ROWS, BE_TABLE_SIZE);
                output_table(crc32table_be, LE_TABLE_ROWS,
@@ -128,7 +128,7 @@ int main(int argc, char** argv)
        }
        if (CRC_LE_BITS > 1) {
                crc32cinit_le();
-               printf("static const u32 __cacheline_aligned "
+               printf("static u32 __cacheline_aligned "
                       "crc32ctable_le[%d][%d] = {",
                       LE_TABLE_ROWS, LE_TABLE_SIZE);
                output_table(crc32ctable_le, LE_TABLE_ROWS,