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authorHeinrich Schuchardt <xypron.glpk@gmx.de>2015-04-16 12:47:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-17 09:04:06 -0400
commitff691f6e03815dc8f99461ea509df863a879fc3a (patch)
treeacc3b3c61ff40365d15cbe89952c743b301016af /init
parent3ea7f5e25ec271909451b7dc17be37581b888de6 (diff)
downloadlinux-sh-ff691f6e03815dc8f99461ea509df863a879fc3a.tar.gz
kernel/fork.c: new function for max_threads
PAGE_SIZE is not guaranteed to be equal to or less than 8 times the THREAD_SIZE. E.g. architecture hexagon may have page size 1M and thread size 4096. This would lead to a division by zero in the calculation of max_threads. With this patch the buggy code is moved to a separate function set_max_threads. The error is not fixed. After fixing the problem in a separate patch the new function can be reused to adjust max_threads after adding or removing memory. Argument mempages of function fork_init() is removed as totalram_pages is an exported symbol. The creation of separate patches for refactoring to a new function and for fixing the logic was suggested by Ingo Molnar. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/init/main.c b/init/main.c
index a7e969d12f51..2115055faeac 100644
--- a/init/main.c
+++ b/init/main.c
@@ -91,7 +91,7 @@
static int kernel_init(void *);
extern void init_IRQ(void);
-extern void fork_init(unsigned long);
+extern void fork_init(void);
extern void radix_tree_init(void);
#ifndef CONFIG_DEBUG_RODATA
static inline void mark_rodata_ro(void) { }
@@ -645,7 +645,7 @@ asmlinkage __visible void __init start_kernel(void)
#endif
thread_info_cache_init();
cred_init();
- fork_init(totalram_pages);
+ fork_init();
proc_caches_init();
buffer_init();
key_init();