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SubjectSuspicious compilation warning
Hi,

I get this warning while compiling for ARM/SA1100:

mm/sparse.c: In function '__section_nr':
mm/sparse.c:135: warning: 'root' is used uninitialized in this function

With a small patch in fs/proc/meminfo.c, I find that NR_SECTION_ROOTS
is zero, which certainly explains the warning.

# cat /proc/meminfo
NR_SECTION_ROOTS=0
NR_MEM_SECTIONS=32
SECTIONS_PER_ROOT=512
SECTIONS_SHIFT=5
MAX_PHYSMEM_BITS=32
SECTION_SIZE_BITS=27
MemTotal: 28848 kB
MemFree: 15516 kB
Buffers: 112 kB
Cached: 2312 kB
SwapCached: 0 kB
Active: 984 kB
Inactive: 1628 kB
Active(anon): 188 kB
Inactive(anon): 0 kB
Active(file): 796 kB
Inactive(file): 1628 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 24 kB
Writeback: 0 kB
AnonPages: 208 kB
Mapped: 292 kB
Shmem: 0 kB
Slab: 1472 kB
SReclaimable: 744 kB
SUnreclaim: 728 kB
KernelStack: 200 kB
PageTables: 32 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 14424 kB
Committed_AS: 772 kB
VmallocTotal: 614400 kB
VmallocUsed: 33316 kB
VmallocChunk: 573436 kB

Regards,
Marcelo.


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