tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 84db9c17966188a15e1f2266e6ef80b353114c21
commit: 37c651e39edd43099b840daeed4ccf3331ba8def [7943/8276] mm: add utility for early copy from unmapped ram
reproduce:
# apt-get install sparse
git checkout 37c651e39edd43099b840daeed4ccf3331ba8def
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> mm/early_ioremap.c:235:31: sparse: incorrect type in argument 1 (different address spaces)
mm/early_ioremap.c:235:31: expected void [noderef] <asn:2>*addr
mm/early_ioremap.c:235:31: got char *[assigned] p
vim +235 mm/early_ioremap.c
219 }
220
221 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
222
223 void __init copy_from_early_mem(void *dest, phys_addr_t src, unsigned long size)
224 {
225 unsigned long slop, clen;
226 char *p;
227
228 while (size) {
229 slop = src & ~PAGE_MASK;
230 clen = size;
231 if (clen > MAX_MAP_CHUNK - slop)
232 clen = MAX_MAP_CHUNK - slop;
233 p = early_memremap(src & PAGE_MASK, clen + slop);
234 memcpy(dest, p + slop, clen);
> 235 early_iounmap(p, clen + slop);
236 dest += clen;
237 src += clen;
238 size -= clen;
239 }
240 }
241
242 #else /* CONFIG_MMU */
243
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