diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 16 | ||||
| -rw-r--r-- | lib/mpi/mpicoder.c | 38 | ||||
| -rw-r--r-- | lib/vsprintf.c | 1 |
3 files changed, 27 insertions, 28 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index e2894b23efb6..3e0b662cae09 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1353,20 +1353,6 @@ config RCU_CPU_STALL_TIMEOUT RCU grace period persists, additional CPU stall warnings are printed at more widely spaced intervals. -config RCU_CPU_STALL_INFO - bool "Print additional diagnostics on RCU CPU stall" - depends on (TREE_RCU || PREEMPT_RCU) && DEBUG_KERNEL - default y - help - For each stalled CPU that is aware of the current RCU grace - period, print out additional per-CPU diagnostic information - regarding scheduling-clock ticks, idle state, and, - for RCU_FAST_NO_HZ kernels, idle-entry state. - - Say N if you are unsure. - - Say Y if you want to enable such diagnostics. - config RCU_TRACE bool "Enable tracing for RCU" depends on DEBUG_KERNEL @@ -1379,7 +1365,7 @@ config RCU_TRACE Say N if you are unsure. config RCU_EQS_DEBUG - bool "Use this when adding any sort of NO_HZ support to your arch" + bool "Provide debugging asserts for adding NO_HZ support to an arch" depends on DEBUG_KERNEL help This option provides consistency checks in RCU's handling of diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c index bc0a1da8afba..95c52a95259e 100644 --- a/lib/mpi/mpicoder.c +++ b/lib/mpi/mpicoder.c @@ -146,18 +146,25 @@ int mpi_read_buffer(MPI a, uint8_t *buf, unsigned buf_len, unsigned *nbytes, uint8_t *p; mpi_limb_t alimb; unsigned int n = mpi_get_size(a); - int i; + int i, lzeros = 0; - if (buf_len < n || !buf) + if (buf_len < n || !buf || !nbytes) return -EINVAL; if (sign) *sign = a->sign; - if (nbytes) - *nbytes = n; + p = (void *)&a->d[a->nlimbs] - 1; + + for (i = a->nlimbs * sizeof(alimb) - 1; i >= 0; i--, p--) { + if (!*p) + lzeros++; + else + break; + } p = buf; + *nbytes = n - lzeros; for (i = a->nlimbs - 1; i >= 0; i--) { alimb = a->d[i]; @@ -178,6 +185,19 @@ int mpi_read_buffer(MPI a, uint8_t *buf, unsigned buf_len, unsigned *nbytes, #else #error please implement for this limb size. #endif + + if (lzeros > 0) { + if (lzeros >= sizeof(alimb)) { + p -= sizeof(alimb); + } else { + mpi_limb_t *limb1 = (void *)p - sizeof(alimb); + mpi_limb_t *limb2 = (void *)p - sizeof(alimb) + + lzeros; + *limb1 = *limb2; + p -= lzeros; + } + lzeros -= sizeof(alimb); + } } return 0; } @@ -197,7 +217,7 @@ EXPORT_SYMBOL_GPL(mpi_read_buffer); */ void *mpi_get_buffer(MPI a, unsigned *nbytes, int *sign) { - uint8_t *buf, *p; + uint8_t *buf; unsigned int n; int ret; @@ -220,14 +240,6 @@ void *mpi_get_buffer(MPI a, unsigned *nbytes, int *sign) kfree(buf); return NULL; } - - /* this is sub-optimal but we need to do the shift operation - * because the caller has to free the returned buffer */ - for (p = buf; !*p && *nbytes; p++, --*nbytes) - ; - if (p != buf) - memmove(buf, p, *nbytes); - return buf; } EXPORT_SYMBOL_GPL(mpi_get_buffer); diff --git a/lib/vsprintf.c b/lib/vsprintf.c index da39c608a28c..95cd63b43b99 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -17,6 +17,7 @@ */ #include <stdarg.h> +#include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/module.h> /* for KSYM_SYMBOL_LEN */ #include <linux/types.h> |