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This reduces RSS usage if nss_files is not actually used, and can
be used later to make NSS data thread-specific. It also results in
a small code size reduction.
Before:
text data bss dec hex filename
2288 0 72 2360 938 nss/files-alias.os
1807 0 72 1879 757 nss/files-ethers.os
1371 0 72 1443 5a3 nss/files-grp.os
6246 0 72 6318 18ae nss/files-hosts.os
869 0 0 869 365 nss/files-initgroups.os
666 0 0 666 29a nss/files-init.os
1934 0 0 1934 78e nss/files-netgrp.os
2353 0 72 2425 979 nss/files-network.os
2130 0 72 2202 89a nss/files-proto.os
1372 0 72 1444 5a4 nss/files-pwd.os
2124 0 72 2196 894 nss/files-rpc.os
2265 0 72 2337 921 nss/files-service.os
1125 0 72 1197 4ad nss/files-sgrp.os
1124 0 72 1196 4ac nss/files-spwd.os
After:
text data bss dec hex filename
2040 0 0 2040 7f8 nss/files-alias.os
1599 0 0 1599 63f nss/files-ethers.os
1155 0 0 1155 483 nss/files-grp.os
6010 0 0 6010 177a nss/files-hosts.os
869 0 0 869 365 nss/files-initgroups.os
666 0 0 666 29a nss/files-init.os
1934 0 0 1934 78e nss/files-netgrp.os
2129 0 0 2129 851 nss/files-network.os
1914 0 0 1914 77a nss/files-proto.os
1156 0 0 1156 484 nss/files-pwd.os
1908 0 0 1908 774 nss/files-rpc.os
2057 0 0 2057 809 nss/files-service.os
909 0 0 909 38d nss/files-sgrp.os
908 0 0 908 38c nss/files-spwd.os
1090 0 8 1098 44a nss/nss_files_data.os
27674 code bytes before, 26344 code bytes after, so it is an overall
win despite the extra initialization code.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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